I NEED ADVICE! PLEASE!

im 17. i just lost my virginity a week or so ago to my bestfriend of over a year who is now boyfriend of alittle over 10 months. so the first time we had sex we used a condom. all good. the second time which was a couple days ago we didnt use anything but the pull put method. im new to all this so i would stop him every like 10 seconds and make him pull out just cause i was nervous and this lasted for maybe 2 minutes cause i didnt want to go any further without protection. so that was it. after getting this app i found out i was at a 22% high risk of getting pregnant. im due for my period in 10 days and im freaking out. i cant be pregnant..not yet. so please.. does anyone have any advice they could give me? tell me information and facts i should know? im i just over thinking? should i be worried?