Opinions? Please help!

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My last period was June 29 to July 3rd. My boyfriend and I had unprotected sex on the 5th of July, he did not cum inside of me and I took Plan B within an hour of doing the deed.

On July 11, I got my "period" again. I am still unsure if this was actually my period or a side effect of the Plan B. It was pretty normal bleeding (for a period, heavy for spotting?) that lasted 2 or 3 days.

Then on July 13 (I am unsure of the specific date) we had sex again and used a condom, however in the process of putting it on he did it wrong and put it backwards. He then turned it around, put it on and we had sex. I am pretty sure there was no precum as I don't remember him being wet, but I don't know for certain.

Currently, I am 1 day late from my period and have been experiencing mild cramping, sore nipples, fatigue (like I usually would before my period) for a week now. Before yesterday I had been having really wet, clear discharge but now I am dry. Could the dryness be a sign of my period coming?

What are your opinions about my current situation? Could I be pregnant? I am 19 and not ready to have a baby.