Help, is this EWCM or???

I don't ever have any memory of ovulating.... my husband and I have been trying for a baby for about 18 months now....just finished my 6th and final round of clomid about a week ago. This App predicts me to ovulate in 3 days....I have PCOS and often get a lot of "positive" opks because I often have high LH. So I figured this month I wouldn't even bother trying to test for ovulation or worry about timing.

My husband and I had sex last night and I also used Preseed. When I went to the bathroom this morning, I had this big glob of clear, stretchy, sticky fluid. Idk if it is EWCM, leftover preseed or leftover semen. I will say this is the most of whatever it is, I've ever had.

Any advice on what everyone else thinks it is?