Hi. Congratulations on your pregnancy! So, glad you stopped phentermine. That's the right step. Remember that it washes out of your system when you do that. I found a link to give you that talks about it's use before you realize you are pregnant. There aren't a lot of studies, they say, however, the ones that exist does not suggest any link to usage when conceiving and in very early pregnancy with birth defects. https://www.healthline.com/health/pregnancy/phentermine-and-pregnancy#before-pregnancy The big risk is if you were to keep taking it, losing weight and such while trying to nourish your growing baby. So, I am pretty sure all should be fine. DO, please DO talk to your doctor when you start your doctor's visits. They will confirm this. Prenatal care is important! But I think everything from what I've read leans toward not being an issue for your baby that you took phentermine during early pregnancy. Keep in touch with how you are doing!