Testing for ovulation, high fertility readings for many days. on cycle day 28 i got peak fertility reading in the am and light bleeding hours later.

Irrregular cycles?: Hard to answer because I don't know your menstrual pattern. Do you consistently have 28-30 day cycles? Cycle day 28 is very late to get a peak reading. That implies that you have irregular cycles. Some women have chronically high LH levels all the time (PCOS) and those kits don't work well for them. There is a slight drop in estrogen levels around the time of LH surge so that could explain bleed.