First response faint line. Negative clear blue digital?

Hi ladies,

I’m 3 days late and on cycle day 33 (cycle days anywhere from 28 days to 33). 3 days ago I woke up and bled so thought it was just my period but had nothing else since then (I’m usually very heavy and periods last on average 9 days) My nipples are sore to touch and have been for about a week now which isn’t usually a period symptom for me.

Anyway I done a first response test and got a very faint line 3 days ago so I bought a clear blue digital to spell it out for me but got a negative. I tested again this morning on day 3 of being late and got another faint line..

What do you think?