Pregnant???

So my boyfriend and I had sex for the first time (with a condom) and I bled after that for about four days but it wasn’t time for my period. Then we had sex again (without a condom) about a week later. I am on the pill and he pulled out that second time. I haven’t had my period since I bled after losing my virginity but according to this app it was supposed to happen six days ago. According to my birth control it isn’t supposed to happen for another week. Do you think there is a chance I could be pregnant? It has been nawing away at me because I am only 17 and can not have a child right now and it’s really hard to get hold of a pregnancy test for me to test it.