When I took my post-sex pee tonight I noticed a pink tinge on my toilet paper after I wiped.  What could this be?  I'm 3 DPO - could this be leftover ovulation blood ( I know that's rare but I can't figure out what this might possibly be).  No pain or discomfort.  I googled it and there was a laundry list of scary possible causes - I don't feel like I should worry but ugh, maybe I should!  Any ideas? Thanks!