Missed pills and took plan b!

So I decided to skip my period this month with bc pills. I started my new pack of pills but took the first 3 late. I’m technically supposed to be on my 3rd placebo pill but since I’m skipping I went straight to the new pack. Since I took it late and had sex on the 3rd day, I decided to take a plan b today (12 hours after sex) for extra protection just in case. I’m not sure if I even needed it but i wanted to be safe.

However, 3 hours after taking it I noticed I started to slightly cramp and spot. I’m not sure if it’s my actual period since I did take the first 3 pills late during my placebo week. This has happened to me before where I’ll take my pills late and my period comes early. I usually get my period on the 3rd or 4th day of the placebo week so it makes sense that it’s possibly my actual period. I’ve read that plan b can cause spotting, but not for a few days after taking it. Idk what it could be!?!

Also, when I had sex yesterday I noticed after that I was slightly spotting. Like I said, I think it’s the fact that I was on my placebo week and I took the first 3 pills of the new pack I was supposed to take later than usual. So my period was supposed to come today anyways but I’m not sure now after starting the new pack late and taking the plan b?