Paranoid or reason to worry?

I am on BC pills but just recently i skipped a couple of days and had to catch up. I took all of the pills in my pack, but just had to double up a couple days. Usually when I do this, my period is either late or early. I had sex May 31 without a condom but he pulled out. I am now caught up on my BC pills, but still worried I could’ve gotten pregnant. I am having symptoms of starting my period very soon, but I’m not supposed to start until the 15th. I’m hoping this means I’m going to start early since I messed up my pills. I’ve read that if he urinates after his last ejaculation, there’s a very slim chance of getting pregnant from precum. Should I be fine or do I need to worry about getting a test? I think I might just be getting paranoid but wanted a second opinion!