So confused

My husband and I have been ttc for 3 months. My cycles are 21 days, and my periods last usually 7 days. Very heavy bleeding for the first two days and very bad cramping. Right now I'm in my ovulation window and we had sex last night. I woke up this morning and every time I pee I have vaginal bleeding when I wipe, it's thinned out blood and it's very very light and more pinkish/ red. I ended my period last weds and it was very heavy and my cramps were some of the worst I've had in a long time. I never bleed between periods at all so this is very abnormal, I'm like clock work with my cycles and very predictable with my body. What could this be, ovulation bleeding? A few hours is too soon for implantation bleeding right? I'm sure I am over thinking it but just wanted some opinions. I have no symptoms besides feeling bloated right now, boobs aren't sore and I'm no more tired than usual and not nauseous at all. Thanks!!