HELP IS URGENT

I lost my virginity to my boyfriend in January, since he doesn't live in my area we see each other at least 2-4 times a month and we have sex each time. My only type of birth control are condoms because I don't have access to the pill or others. I always check the condom before we do it with a flash, and I even stop here and there to check it and all I can see is the pre cum inside the condom and no leakage. Last month of May we did it in a parking lot and he cummed on my boobs, so there was no contact with sperm. I was late on my period the month before, thank goodness I got it anyway around the 30th to 5th. It's the 28th and usually I get a lot of discharge before my period and I haven't gotten any of it. I'm afraid maybe somehow sperm was able to make it into my body?But he always throws the condom away and makes sure we were protected. I know you can still get pregnant using them but it isn't likely? When he "finishes" he does on my butt or on my stomach. I'm only 15 and I haven't gotten any symptoms. Should I wait for the end of the month and see if it comes? Or maybe it's too soon for my period to come because last month it was late? I don't remember the exact dates I got my period but I know it was later than before and had a pregnancy scare many times before including last month. Should I wait it out? Options??Please help!!