An Atlanta couple says they were struck by a “very intense” mystery illness while vacationing at the embattled Dominican Republic resort chain where four American tourists have died.

Vanessa McNelley-Neal and her husband, James Neal, stayed last November at the Bahia Principe hotels, where they both became violently ill, news station WXIA reported.

“We had a good couple of days and then started feeling ill, started having really bad abdominal cramps,” McNelley-Neal told the news station.

McNelley-Neal — who has come down with food poisoning before — said the symptoms were like nothing she’d ever experienced.

“I had food poisoning years ago in Tahiti, so I know what that feels like, and it did not feel like that,” she said. “The stomach cramping was very different. It was very intense. It was not the normal stomach pains.”

Her husband said he also faced a lot of similar symptoms.

“I had a heavy headache that just lasted and lasted,” he said. “I took everything and nothing fazed it.”

The couple did some research and found other guests who had the same complaints as they online.

“We just left it be until people started having the same issues and it sounded very similar to what we had going on and it just didn’t make a lot of sense,” McNelley-Neal said.

They remained sick for three weeks after returning home and underwent several tests — but never got to the bottom of what caused the illness, according to WXIA.

The couple said they’re speaking out in the wake of reports of six American tourists’ deaths, including four fatalities at Bahia Principe hotels on the island.

Miranda Schaup-Werner, 41, of Pennsylvania collapsed and died from a heart attack on May 25 at the resort in La Romana. Five days later, Nathaniel Holmes, 63, and Cynthia Ann Day, 49, of Maryland were found dead at the same hotel from pulmonary edema and respiratory failure.

Relatives of another Pennsylvania woman recently revealed she died at the Bahia Principe resort in Punta Cana last June. Yvette Monique Sport, 51, reportedly died from a heart attack in her hotel room.

“We just want to say our part and hopefully other people would come forward and there will be an investigation,” Neal said.

A rep for Bahia Principe Hotel & Resorts provided a statement to The Post declining to comment further on the cases.

“Bahia Principe Hotels & Resorts would like to express our deep respect to the authorities and the ongoing investigations,” the statement said. “We reiterate our firm commitment to collaborating completely with the authorities and hope for a prompt resolution of their inquiries and actions and will not be making any further statements that may interfere with them.”