Story highlights The public testimony on a proposed Texas "bathroom bill" lasts 13 hours

The bill goes to the full Senate after committee passes it 7-1 early Wednesday

(CNN) The Rev. David Wynn told Texas lawmakers how the proposed "bathroom bill" would affect him, one of the hundreds to speak in about 13 hours of public testimony.

Wynn, a transgender man with a full beard, said his birth certificate still says "female," so he would be required to use the women's restroom under the new rules.

"There's been a lot of conversation, too, about having men in the women's bathroom," Wynn said, according to The Texas Tribune . "And I guarantee you there's going to be a problem if I show up in a woman's bathroom."

Wynn was among the opponents who testified Tuesday at the Texas state capitol in Austin to oppose the "bathroom bill," which critics argue unfairly discriminates against transgender people. Protesters gathered in the outdoor rotunda near the statehouse, carrying signs and making speeches against the legislation.

Texas Pastor says "we've got to stop using God as an excuse to hate people." #stopsb6 #txtogether #txlege pic.twitter.com/7SHfcoGHYN — Drew Anderson (@AndersonDrew) March 7, 2017

But supporters say the bill would protect women and children and give them privacy and that it isn't intended to target any group.