Six days late, brown spotting and negative test

Hi ladies,

I was just wondering if anyone has had a similar experience to me?

I’m six days late for my period (day 35) and have brown spotting only when I wipe which started maybe seven hours ago.

I always get cramps and back pain before my period starts but I haven’t had anything since my last period.

I’ve taken three tests over the past few days but all have come back negative. My partner and I have been using condoms and none have broken or come off, but we’ve only been using them towards the end of the deed. So I’m not sure whether or not I could be pregnant or I’m over reacting?!