I'm having a boy BUT..

I had my baby girl in December now I'm having my little boy in January. 😍😍 The only issue I had with her was my fluid levels were low near 30 weeks.. I'm 18 weeks with my boy tomorrow.. My doctor said it's nothing to worry about because it's still early but she said my baby is breach (no big deal he'll be moving a lot before I give birth) but she also said my placenta is close to my cervix and not to have sex until I go back next month.. I'm just scared cuz she was talking about I may have spotting and if I do go to the ER right away.. Anyone else ever have their placenta close to their cervix??