I had a miscarriage

I’m 18 years old. I spent the night at my boyfriend’s apartment a couple months ago. We drank too much and had unprotected sex. In the morning I told him I think I am going to take a plan b just to ensure I didn’t get pregnant. He talked me out of it and told me it wasn’t necessary because I want even close to ovulation. I ended up not taking one. My period was late by 2 weeks. It was fairly common for my period to be irregular. I was going to take a pregnancy test, but then I started what I thought was my period. I had the most intense cramps of my life. I ended up calling my mom and wanting her to take me to the hospital at one point because of how painful they were. The second day of my period I noticed the blood was extremely thick with multiple blood clots. There was also something else in the blood. It looked white, maybe clear. I then decided to go to the gyno since these were alarming and painful occurrences. She told me I was not having a period and I was having an early miscarriage. I have never experienced so much emotional trauma. Seeing multiple pieces of the baby be released from my body within the next couple days. I can’t talk about it, I can barely even write about it. I know I should tell my boyfriend but I just don’t know how. And now I’m wondering if I can even carry a child at all. I don’t know what to do and I am going through this all alone