Abortion 6 years ago.

I had an abortion 6 years ago I believe it was. Still to this day it bothers me and anytime I have sex I get paranoid that I'll have to go through it again. I had sex in may used a condom, took a plan b literally did everything I could to prevent it. I got my period late in may I'm assuming because of the plan b and then somewhat earlier in June the period I had in june had clots and everything in it. I got so concerned and paranoid that I had my blood drawn and the test came back negative. Now I've been spotting and my period is due tomorrow but I'm so paranoid that I'm going to be pregnant. Has anyone ever had any issues like this before? Are you constantly paranoid? I just feel so alone in all of this and it's crazy because it's been 6 years ☹☹