i don’t know what’s happening! please help (TMI)

I had a two day period (when mine is usually 4 days), it was quite dark an thick, and once it ended i’ve been like “spotting” for the last two days, but basically it’s just dark brown discharge. It has been similarly thick - like clots almost, which is not usually what the end of my period / spotting is like for me.

I also had sharp pains in my lower abdomen (on the right side) when my period started and my stomach has been kinda bloated (which i also usually don’t experience).

does anyone know what this could be?

any help would be greatly appreciated, thanks! 💗