In need of some advice please

I dont temp and I dont use opk's I believe I already ovulated but I could be wrong. Friday night my DH and I did the deed and finished at the exact same time and now I am having some pink spotting anyone have any ideas what could be going on? I did have some cramping yesterday but that is to soon for anything to be happening so I am a lil confused. Any advice would be great, thanks in advance!!