Plan B side effects or implantation bleeding?

I also want help... So it sounds crazy that I would even be worrying about being pregnant with no penetration and only pre-ejaculate and no ejaculate, but I've read that it's still possible... My boyfriend and I had a lot of genital rubbing and he fingered me really far in on October 28 and October 30. The evening of October 30th I started bleeding (9 days before my expected period) and it was lighter than my usual period with cramps only right before the bleeding. I didn't think anything of it until I looked up things online about how you can still be pregnant without penetration, so I took Plan B One Step on Monday, November 2 just in case it could still do anything. The bleeding stopped pretty much (just small spotting every once in awhile) until Friday when I had cramps and started bleeding again. It was off and on and heavier and ended on Monday. I also experienced extreme sharp pain on the right side of my lower back that made almost the entire right side of my body feel numb-like. During that whole week I also felt sick, but it could've been from stress. I was seriously so stressed. After Monday, November 9th I felt fine until about November 18th, which is about 10 days before my "next" period would start in which Uterus just started feeling weird. Like my normal PMS cramps. And I'm probably psyching myself out but I just feel like I look slightly bigger in the belly but possibly could be from bloating. All I know now is that my uterus just feels heavier and I'm scared. Has anyone had a similar experience (even experiences where you actually had sex lol) and were you pregnant? I stopped taking pregnancy tests last week. They had been negative until that point and I didn't want to get a positive right before thanksgiving. Too much stress.