Go to your doctor! nobody will know for sure, so just go to PP or your normal doctor to be safe. No use wondering for a while.

I don't think (although I'm not 100% sure) that tears in your vagina could result from hormones in bc pills.

The logical reason is probably friction due to sex. Since the vagina is an opening, it would take a little while to heal, like when you get a cut in your mouth for example. Sometimes the inside of my nose gets irritated and it doesn't heal for months. Could be something like that.

A tear in your vagina should heal after a while...

If it is itchy, that could mean it is infected. It's common to tear your vagina during sex, and hormonal changes can contribute to your vagina being more dry than usual, which could make the irritation and tearing easier. Try using lube if you think that might be the problem.

But if it's not going away, you should probably check with your doctor.

I totally have this problem as well. My boyfriend and I were messing around. We've never had sex because I'm a fairy tale romantic, but he was putting his fingers in me and it really hurt. A week later, I noticed a small cut around the opening of my vagina. I blotted the blood away and the next day I was itching like crazy. I had to clip my nails because they had created even more cuts. It's now the weekend and I can't get to my OBGYN until monday and I work that day and Tuesday I have class. I'm not sure I can stand the itching for that long. I tried the vinigar rub last night. It hurt like HELL but it did help me finally get to sleep. This morning it itches more than ever so I mixed some vinigar in a bath and there was no change.