Can you gain weight after stopping birth control? I was on the mirena for about 3 years after getting it removed in February of this year because my husband & I were ready to start trying for another baby. And I've pretty much been on some kind of birth control since I was 16 maybe even before then. I got pregnant at 18 while switching between BC methods on "accident" & now we've been trying & haven't had any luck but I have put on some weight, enough for people around me to notice I have. Coworkers have asked if I was pregnant, and even my family has.