When does implantation bleeding occur?!

I didn't take a picture but after wiping today I had a small amount of pink tinted urine. I thought AF was coming early so went out and got tampons. My husband just had surgery so things have been chaotic and I forgot to put in a tampon. I just went to the bathroom again and there was nothing red or pink/no blood. This cycle I don't know when I ovulated, because I think I tested with opk too late and missed it. Based on what I know, I think I ovulated about 2 weeks ago. Could what I had today be implantation bleeding or is the timing not even possible? I feel like 14DPO is too late for implantation?