Ok so about a month ago I forgot to take my birth control pill for 3 days in a row and then I had been taking them for about 2 days and had sex could I be pregnant? I got my what I think is my period a day late but it wasn't like my normal period ( a doc told my friend that if your on the pill your body might just bleed out of habit) I also had lower back pain and I've been off for about 2 weeks an the last few days I've gotten a really thick white discharge that I've never had before

If you had sex, you could be pregnant. There is no form of birth control that is 100% effective and since you missed some pills that increases your chances.