I truly need some advice.

My whole cycle has been super weird and not normal for me. My entire boobs don’t usually hurt only the sides near my under arms when I get ready to start but the whole things have been hurting this go around, my period was 4 days late practically and yesterday I started bleeding this light pink and now it’s this, every occasionally I’ll get red but I’ve been passing a lot of this stuff. (None of it has been heavy and I haven’t been cramping at all) I took tests but all are negative I just don’t know what could be going on. I’m so confused.