For some people who are sexually active and want to have children one day—but not right now—certain anxieties can come into play. On the one hand, you're anxious about the idea of getting pregnant since you're not ready to raise a human at this moment. But you also worry, "When I do want to have children, will I be able to easily, if at all?" It's an anxiety that Kelly Weill, 23, experiences, and she summed this up perfectly in a drawing she shared this week on Twitter.

The New York-based journalist drew a bell curve, with "period" at the highest peak in the center. On the left side of the curve, she wrote, "Oh no, what if I'm pregnant?" And after the peak, she wrote on the descending side of the curve, "Oh no, what if I can't get pregnant?" She captioned her drawing: "having a womb and anxiety: it's bad." Weill says this drawing represents a regular cycle of anxiety for her, and she wanted to share it this month with her followers.

"My period was late, probably due to stress and me treating my body like one of those floating trash islands," Weill tells SELF via Twitter message. "I worried I was pregnant, then when I took a negative pregnancy test, I worried I'd stressed myself into sterility and that I'd die childless and barren. I do this regularly."

For Weill, it's an anxiety of being able to make the choice she wants to make—not have kids, have kids—when she wants to make it. "The prospect of having a baby is terrifying, and the prospect of not being able to have a baby is terrifying," she says. "I joke around about parenthood, but I really would like to have children eventually, at the right time and on my own terms."

The average U.S. woman wants to have two children, according to the Guttmacher Institute

No surprise: most individuals and couples want to plan when they have children—and with good reason. Having control over one's reproductive future is incredibly important. Births from unintended pregnancies are connected with adverse maternal and child health outcomes, according to the Guttmacher Institute. Women being able to control if and when they have children, as well as how many children they have, is beneficial for them, their families, and society as a whole. Women who have control over their reproductive future have a chance to reach educational and professional goals, which can help them increase their economic standing. And planned pregnancies save money—births, abortions, and miscarriages stemming from unintended pregnancies cost the U.S. government $21 billion in 2010, according to the Guttmacher Institute.

U.S. women, on average, will spend three decades—which equates to more than three-quarters of their reproductive lives—trying to avoid an unintended pregnancy. Still, in 2011, 45 percent of all pregnancies in the U.S.—that's 2.8 million pregnancies—were unintended. And 27 percent of those unintended pregnancies were mistimed, meaning a woman did not want to become pregnant at the time she did, but she wanted to become pregnant sometime in the future, according to the Guttmacher Institute.

And when women decide they do want to have a child? It's not always easy. An estimated 7.5 million U.S. women have an impaired ability to get pregnant or carry a baby to term, according to the Centers for Disease Control. Another staggering statistic: 1 million women in the United States are infertile, which is defined as unable to get pregnant after 12 consecutive months of unprotected sex with their partner.

This push-and-pull of different pregnancy-related anxieties is incredibly relatable.

Weill says she's discussed the issue with her friends, many of whom feel the same way she does. She’s also noticed that anxiety increase in the face of attacks on reproductive rights, most recently the proposed American Health Care Act, which could negatively affect both contraceptive coverage as well as maternity care if it's passed. The bill could allow states to stop requiring insurers to provide essential health benefits (like maternity and newborn care), and insurance companies could also mark up premiums on health care coverage for people with pre-existing conditions (which can include pregnancy). It's a fear of being able to make the choice you want at the right time, and also the fear of not having access to the resources you need at the right time, too.