Flo is soo painful comes and goes

[Dogcatfan87]

I’ve had a missed period for over 21 days, all the pregnancy symptoms but no positives.
out of nowhere today, my AF turns up. No pre warning or signs.
it’s not incredibly heavy, but bright red. However the cramps have started and it’s very painful. Even had a few loose TMI bowel movements.
am I expected to have it bad as I’ve missed it?

currently sitting in bath to ease pain which goes and comes now…..

ive also developed a small rash on my lower abdomen

I wonder if it's a very early miscarriage?

@Dogcatfan87 my AF has been like this since I got my second vaccine in October! Even had a rash in the same place last month.
My GP is completely baffled as to what has happened, took 2 sets of bloods and going for my third on 26th. GP also has made a referral for an ultrasound on my ovaries that I'm going for on 20th. If you're worried go check in with your GP. I hope you're ok?