Chrissy Teigen has had a crazy few months. A day after revealing that she and husband John Legend were pregnant with a third child, she is sharing more of the wild back story. In a series of tweets, she admits that she found out she was pregnant during her breast implant removal surgery in June. “It’s quite a story,” she writes.

“I did the routine pregnancy test you do before surgery. It said negative. It was not negative,” the Cravings author tweets, adding she took another test after the June 19 surgery.

“I was scared s–tless … was pretty positive you shouldn’t get your boobs out while pregnant.”

The au natural version has some drawbacks, she says: “Part of me misses the safety of my perfect embryos, created in their little dish. They felt untouchable and safe. Now I feel a bit…eggshell.”

She adds that she was shocked that she got pregnant without fertility treatments. She and Legend welcomed Luna, 4, and Miles, 2, after she went through IVF. “Luna is very, very excited. Miles, not so much. Jealous!” Teigen writes.