Is There A Chance Of Pregnancy After Periods?

Hi. I'm a 19 year old female and "dry humped" my boyfriend. He had his jeans and boxers on, and I had my jeans and undwear on too. Is there any chance that the sperm could've seeped through the layers of clothing and gotten me pregnant. I got my period, but I read you can bleed during pregnancy. I've been bloated and have been getting a sharp pain on my left hand side of my stomach. This was about a month ago.