Brown discharge & ovulation date

Lindsay

Hoping for some advice please. Normally my period is over & done with in 5-6 days, including the brown discharge at the end. However, my last period on 20/08 was 5 days late (very unusual) but 3 negative tests. Finally came on but the period itself lasted a good week followed by 6 more days of significant brown discharge with tissue. No bad odour or itching, just the discharge. Wondering whether this has affected the timing of my next ovulation? It was due yesterday, had the ew discharge but negative tests. Done some BD just in case, but wondering whether my cycle is going to be completely off now?! Driving myself mad!