Blood

Ok I am trying not to over react here but I'm ttc. This is my first normal cycle after having my IUD removed in Feb. So the last 4/5 days it says I'm ovulating and I believe I am. Well so DJ and I have had sex every day except tonight. Well the last three days I have noticed some red/pink blood only when I have gone to the restroom never onto clothes or tp. Is this implantation bleeding? Could this really be me getting pregnant? It's been so long since my other two children 6 and soon to be 5 that I forgot what all happens lol(pregnancy brain last that long?! Lol) just wondering if anyone could help shed some light for me.