They sell paternity tests at walgreens? Lol crazy.... Yeah I think it's your boyfriends too esp b/c you had the period after you had sex with him....
I will be 23 weeks pregnant Friday putting my conception date around early to mid December. So your Conception date would be right around the same time. Based on that and the fact that you had a period between the times you had intercourse I think it's safe to say it would be your boyfriends child.
Based on your lmp and da fact that you are 22 wks i would def say dat you did not get pregnant until sometime in dec, and also since pregnancy is calculated actually 2wks b4 you are even pregnant give your boyfriend an even better chance...but of course the best thing to do is have a dna test done once the baby is born so you can set your mind at ease. Hope everything works out for ya!!
If you didn't have sex with the "other" guy anytime after 11/28 then there isn't anyway that it could belong to him. After your baby is born if there is any question in your mind you can purchase a paternity test kit at walgreens for $30
If you had a period after the first guy and your measurements are on track then it is most likely your boyfriend's baby. A period is the beginning of a new cycle.