Not sure where to go... But can't tell if this is implantation bleeding...

I'm deathly afraid right now. I cant find answers, and i'm out of statem so i cant go to the doctor. I'm not sure where to post, so I hope here is okay. I just need some answers to calm me down for the moment,

I have irregular periods. They just come whenever. I went to get BCP because of them, and the doctor ran some chemical tests shooting hormones into me. (the irony was I started my period as I was waiting for my appointment)

Since i had extra hormones from the test, I had sex with my boyfriend. (2nd time I've ever had sex) it was Protected with a condom and used correctly. We had sex the first day of my period. So my period continued for the next 7 days. EXACTLY one week later, my boyfriend asks me for favors on the phone. I'm currently out of state. When I finished, I noticed a bit of blood. I flipped out. I wouldnt have noticed because it didnt come out when i would wipe. It wasn't enough to leak out or stain. But an hour later, it disappeared. The next day (or yesterday) I went to see if I could find blood. (sorry for tmi, but I was worried!) it was tinted brown. There were no clots or discharge. It was just color tinted. So there wasn't alot. But since I did the favor, I've been sore inside. It is now gone, there is no tinting.

I don't have regular periods, so i'm a bit afraid because I don't know when I ovulate. However, my cycles on average for the last half year are about 41 days. And EVEN if I was regular, on a 28 day schedule, the blood happened a day before the average ovulation.

There are four possibilities I've narrowed down too.

• blood from ovulation

• Late blood that wasn't released from period

• blood from giving my boyfriend "favors" ( it was pretty hard, and I once had this a few years back, but it was before I was sexually active)

• implantation bleeding

The implantation seems silly considering I most likely haven't ovulated, but a lot of people say it's possible after one week, so I'm worried. Anyone know what this might be? I'm going to the doctor in a few weeks when I go back home.

TL DR; had PROTECTED sex with my boyfriend the first day of my period. A week after it ended, I did "favors" on the phone for my boyfriend and immediately after, I had VERY faint spotting. I have irregular periods, and don't believe I've ovulated. Could it be implantation or me just being too rough?