After miscarriage questions

Hey ladies so I have kind of a weird story on feb 7th I started my regular period that usually is 6 days long, heavy, and has some clots. It ended on the 12th of feb..

I started spotting on the evening of the 20th of feb which I found kind if concerning especially since my next period wasnt due till like 2 weeks, the next morning I just had a weird feeling to take a pregnancy test and it turned out positive, the spotting was still going on which started from light pink to dark brown I was concerned so I went to ER, the confirmed my pregnancy but couldn't locate anything in the uterus but found some free fluid by the right tube so they thought it could he etopic pregnancy. I had my repeat HCG levels taken and they went down so it was a miscarriage. Its been 11 days since I started spotting and for the past days it's been weird were I wouldn't have any spotting at all one day ans the next it would come back,, it would change through out the day from light pink spotting to dark brown to dark red. But today it's now not spotting but more blood coming and bright red color. I'm wondering if anyone had something like this or could it be my period? Because my original next period would be starting in 4 days.. or is that part of the misscaraige.