My period is abnormal. I have had one small clot, could this be breakthrough bleeding?

Latoya asks:My period came on Sunday, and it was supposed to come on Wednesday, but when it arrived it was pink and mixed with discharge that entire day. I had no flow which was unusual, and Monday the same thing, no flow. Today, which is Wednesday, I have a little flow, which is not normal on my third day, and I have had one small clot. Could this be breakthrough bleeding?Penn Medicine