I have a question and hopefully somebody can help me.

Story:
Okay,
intro- I used to be irregular on my period and miss a few months. Then I had a cycle for about 10 months. Usually I was on the last week or first week of a month mostly on Wednesdays, Thursdays or Fridays.

I lost my virginity this summer, me and my boyfriend had sex around June 28/29 there were a few times where we did it without protection but we really did it short enough and every time he pulled out he did wipe off. On the forth of July we had done a few strokes and it wasn't even more than 2minutes. The next day I had my period, Saturday. First 2 weeks of August I was sick then the 3rd week I still had some coughs. (I have not been on my period this month yet)
Am I just going back to irregular
or
Is is possible I'm pregnant?

please help, I'm worried