Very confused?!?

Hi everyone!

This is my first actual post on this app (minus comments I've left on other posts).

So let me start out by saying I was behind on my birth control by two days, and I just caught up on my days tonight. Earlier this week/weekend my boyfriend and I had sex and he did come in me all those times except Saturday night. Anyways, Tuesday morning I woke up feeling very nauseous so I went back to sleep and woke up later in the day and the nausea was gone (except it would come and go every so often). I had cramps and lower back pain, which is a sign of me getting my period. I went to the bathroom after waking up Tuesday and noticed a light amount of blood, so light that I could barely see it. I just brushed it off and went on throughout the day and then later that night I used the bathroom again and there was a good amount of blood in my underwear. I've already had my period for this month (it ended like two weeks ago) and I'm not supposed to get it again for another 11 days. I am meeting with my doctor again early next month so I will be sure to bring this up. Just in case anyone needs to know my age, I'm 19 and I'll be 20 in December.

I've never got my period twice in one month. I'm having all the pains (lower stomach cramp, lower back pain) that I would normally get if I were getting my period at a regular time.

Let me also mention tonight in the shower I was cleaning down there and the blood has a slimy stretchy mucus-y feel to it, except its blood and kind of looks like little clots in a way.

I'm just very confused about all of this and was wondering if anyone has experienced this at all?