Lots of discharge after ovulation?

Hey! So been ttc for 4months now & this time i’m experiencing a lot of discharge after what I suspected was my ovulation window (through using this app, i usually test my LH but ran out 😅). Discharge looks like fertile mucus, so im confused lol im due for my period in 2 days. Took a test this morning but its neg. Could i be ovulating this late?? My cycles for the past 2 months have been semi off due to the jabs though so idk if that could affect ovulation window that much?