Spotting after sex 9 dpo

Anyone have this and it lead to a BFP? We weren't having rougher than usual sex, and I wasn't dry, but when we finished, I saw pink...kinda red spots when I wiped. I assumed AF was on her way so put a pad on. When I woke up, there was no more spotting and hasn't been any throughout the day. There wasn't any spotting on the pad either. Is this a good sign? It's been 18 months of TTC. Thanks!