confused about period?

Hi

Wondered if anybody has had similar experience and could shed some light.

I had a miscarriage at 7 weeks in feb, had 1st period about 4 weeks later, it was a normal 5 day period. my cycle was 35 days before i had miscarriage. I am confused by my 2nd period though it came on day 29, i 1st saw it when i wiped after going to the toilet (sorry too much info!) it was very light for te next few days stopping and starting and going from red blood to dark brown discharge. I have done a pregnancy test on cycle day 32 and was negative so just confused as to why had strange period? didnt feel like a period either.

any help would be appreciated xx