What is this Bizarre Behavior?

My Boyfriend and I had a simple, small, and silly argument which started because I wanted him to listen to a song that popped into my head, so I asked him if he wanted to hear it. He said he didn’t want to cause the artist was gay and he doesn’t like gay people. That didn’t really bug me I’m used to that, I’m guessing it just sprouted into all these thoughts like I don’t have anyone to share with about things that I like,(I don’t have any friends besides him, which hurts at times) that he may not like as well, Or I feel like he won’t even try to acknowledge something I like, if he doesn’t like it as well. So I got upset an got a little teary and he was frustrated for how I was reacting. So we tried to talk about it and I told him how I felt. I then suddenly started sobbing uncontrollably and he started panicking an kept asking, “baby, whats wrong, whats wrong??” And I had no idea what was wrong, it was like I was sobbing but had no (known) reason to do it. I couldn’t stop for awhile and when I tried to stop I sounded like I was hyperventilating, but I did stop. An not even a minute later I had this uncontrollable urge to laugh. I tried to hide my face from my boyfriend because I knew this was odd. But I couldn’t hold it and I started laughing like a crazy person. I don’t know why I did this either, nothing was going on through my head, I wasn’t thinking anything, I don’t understand this at all. Why did this happen?