The patch questions !!

First I'll start by saying I just had a baby 4 months ago.

Started the patch at my 5 week pp visit.

First cycle was fine.

Then all of a sudden things are...wonky...

I had a "period" Nov 28th bleed for only 3 days . cool beans.

Then I put my patch on the 4th. Get into my fertile week according to my ovia. Had sex twice. Realized my patch fell off when I went to go change them out that Friday. (11th) all of a sudden I start bleeding. Like a period. Clots and all. For 3 days. I kept my patch on BC I didn't know what else to do. Plan on changing it again Friday . last patch. Suppose to start my period on the 26th but I don't think I am. I think I funked something up. Also plan on testing around that time too.