Worrying

Is it bad that even though I worry after every time I do something sexual, I still continue to be sexual? It's not like I even have sex though. This guy and I just fool around but after every time, I always have to think through and make sure no cum got down there and there's no way I'm pregnant (even without sex). Then, I wait to get my period and can't wait for it to come. Am I just worrying too much for nothing? (I'm not on birth control). A part of me also feels like if I don't worry, then I could be pregnant just because I was so chill about everything. I'm pretty unlucky lol