cycle day 50: bfn


so im completely lost. i ovulated cycle day 15(took a test), my husband and i had sex the day before and after. i got some very light pink bleeding cycle day 20 (one wipe then nothing) and i haven’t had anything since. i also got another positive ovulation test around cycle day 28 which i thought meant my period was coming since i was getting negative pregnancy test but it never did. like i said its now cycle day 50, i feel fine and no period my last test i took was about 4 days ago! anyone else gone through this? could i still be pregnant? my cycles are irregular, but I haven’t had a cycle over 40 days in eight months. and never this long 😪