Old blood & discharge??

So the other night I had a bit of old blood when I wiped. Figured it was finally my period because usually it always starts with old blood anyways it’s been two days now and it’s still just old blood and a mix of discharge, is this normal? Usually I’m a heavy bleeder on the second day and all I’ve had is old blood and discharge I’m kind of worried. Anyone else have this? Is there a reason for concern? What could it mean?

Side note: my periods are super irregular and I’ve been ttc for about 2 years now with pcos