Misscarriage?

I know this is a shot in the dark, but this has been weighing on my mind VERY heavy the last few weeks.

7 years ago I experienced something that I have never experienced before in my life. I was in my first serious relationship. In the beginning we used the pull out method, of course there were a few times when that method failed. We knew we wanted to be together for the rest of our lives (at that time) so we honestly didn't care. Around Easter 2013 we thought we may have gotten pregnant. I took a test because I missed my period (which was not uncommon for me) and got a negative. About a month later we went on a weekend vacation. I had just started on bc pills a few weeks prior to this trip. I felt fine the entire car ride. We got to the spot at night, walked the beach a bit then went to bed.

This is where it starts: I woke up in the middle of the night curled in fetal position and could NOT move my body. I had enough strength to shove my bf to wake him up. I told him I couldn't move and I was hurting. He carried me to the couch and went to wake up his mom (she has emt background). She came in and the pain was just coming over me in waves. Top to bottom. I've never had kids or been in labor..but in my head, labor is what it felt like. She gave me half a vicaden and within minutes I was out.

The next day I woke up and was bleeding very heavy. We went to walk to the shops and within minutes I had to go back to the room and take more pain meds.

I honestly can't remember how long I bled or what it looked like, but I know the pain I felt was unreal. Something inside of me doesn't feel like that was a normal period. Idk if it was just my first period on bc? But if so why did it feel that way. Or was I pregnant and didn't know? I've read up on chemical pregnancies and I just think that may be a possibility. Is there a way I could ever find out if I actually misscarried?