I am confused whether I'm pregnant or not.

I have missed a period, me and my bf has been intimate three to four days a week after my period ended, I am not aware of when I ovulated but I'm sure I did, I am 5 days late, on Monday I went toilet, when I wiped I saw blood on the tissue but after that time, nothing, I thought I would have started due to sore breast and feeling emotional but nothing, I have peed a lot more than often, feeling extra tired and a little sick, but I'm worried I'm getting excited for no reason due to me having pcos and have gained weight since my last period.

Have you done a pregnancy test? 

Yes, it came out negative