Plan b question

So I recently had this guy come stay with me for the weekend and he came in me probably 3-4 times over the whole weekend. He arrived Friday night I took a plan b Monday night. It has now been 2 weeks and I just got a second period for the month when I had just gotten off my last one 4-5 days before he had come over. I’m just wondering if I should be worried bc this period is weird I’ve taken plan bs before but it’s never affected me like this and this period is sooo weird and extremely light but with dark blood most of the time. I will probably test just to ease my mind but how soon could I also do that? Before anyone judges I am grown and I am fully aware of what I was doing and so was he he didn’t even want me to take the plan b so please keep any rude comments to yourself ty 💞