I'm not sure what's going on

Okay so, today I am 13 days late for my af. I almost feel like my af is about to come but it hasn't. The one weird thing that has happened is that my husband ejaculated inside me 5 days ago and I had a little bit of blood in it so I thought it was my period but that was the only time I saw any blood . I thought maybe it was Implanation bleeding but idk I have taken several hpt but all are negative . Ive been feeling super tired lately, mild cramping ( not much at all) and my boobs are hurting badly. I've also noticed I've Been having lots of creamy cm. im not sure what is going on. Hoping I get answers soon .  Ttc #1