Serious Poop Problems?

I had black diarrhea and severe bloating two days ago and it was gritty looking and mostly liquid... like a LOT of liquid with black bits everywhere in it. I had bad acid reflux that day, as I have been diagnosed before with severe acid reflux and I get it a lot. Well, when I had this diarrhea I was feeling gurgling from my upper intestines and then it would shoot down immediately to my bum where I would have to desperately clinch to keep it inside. I pooped my pants twice in my sleep. It became a pasty black poop the next day which was yesterday, and today it is a pasty stool that is clay colored. All this time I have not had any fever whatsoever and I did not feel sick and didn't feel hot or anything... I felt normal as I still do. Well, except for starting my period today. I thought maybe the black poop was bleeding from my esophagus which would make sense with the severity of my acid reflux, but the liquid diarrhea part stumped me. Now that the poop is clay colored I am thinking that all the severe bloating that went on during the diarrhea may have... idk... obstructed the bile ducts...? So yeah I don't really have any clue now. Maybe it's the period? I have never EVER had black or clay colored poop problems before! I know the poop talk is really funny, as I have been joking about it with my mom and dad, but I need some advice before going to a doctor!