Periods/pregnancy

This is probably going to sound really dumb but my anxiety is getting the best of me. I had fully protected sex condom, birth control and pull out method last month on the 11th.

A few weeks later i got my period 2 days before it usually does and it only lasted 4 days. (it usually isn’t the same number of days every time) it seemed lighter than usual this time. My stomach has felt bloated and i feel very freaked out that for some reason i could be pregnant because my period was shorter so could it been implantation bleeding??

I know i am not ready to be having sex so I will need to educate myself more but i need help