should I be worried?

hey everyone, so I have recently had a new partner after getting out of my three year relationship. I have been on birth control (the pill) for four years and haven't ever had any problems with it, even when my boyfriend finished inside me. I noticed that right after sex with my ex, a good portion of the sperm would drip right out (we had sex about one a week due to distance), but with my current partner, we have sex more frequently, but I have only experienced the sperm drip out a few times. I'm not sure what this means or what the difference could be. should I be worried that I'm potentially pregnant? I'm supposed to get my period on Tuesday or Wednesday. please comment your thoughts!