One week late, light brown discharge, negative hpt, tiredness

Looking for people’s thoughts:

My period is a week late, on the day I was due to start I had a slight brown discharge but only when I wiped.

I am more tired than usual but when I took a hpt it was negative.

I’m going to buy a first response early pregnancy test today and test first thing tomorrow incase the hcg was too low.

Has anyone had the same experience and got a positive afterwards?