Just wondering how likely or unlikely it is for me to be pregnant from this out come,

I am on Estelle and missed a week of my pills due to me and my MIL having a fight which led to me leaving and staying with my dad, I didn’t take anything with me therefore I didn’t have any contraception, I then started to bleed and just classed that as a period and returned home and started a new packet instead, I then had my “period” from the 17/7-23/7 and all was good I then had unprotected sex with my partner on the 24th (he finished in me), today I had a bit of pink blood when I wiped but when I went to the bathroom hours later it was gone, could it be like a break through bleeding or something from all the pills I have missed or could it be implantation bleeding?