Advice please

[Clo3xox]

Advice please . My periods are normally regular and always on time , however my past two cycles have been 4+ days late and really light . They're that light that some days I didn't have to wear a pad as it was only when I wiped that I had the brown/pink blood . The bleeding only lasts 3/4 days then it stops . However all the pregnancy tests that I have taken have came back negative . Has anyone else had this before ?

Ive had this twice before. Once it turned out to be a urine infection sadly! It was the gp who confirmed it for me.
The second time seemed to be a very short/ irregular period but the next month I was pregnant. I was sure I must of been earlier than they said but going by scan dates the hospital are right- not me 😂
Maybe get a check up?

I've been having short periods since I had the covid vaccine. I know others have had the same. Mine were only ever 3 days before, now they are about 36 hours.
I have had some 3 week cycles and currently at the end of CD32 with no sign of AF including none of my usual heavy PMS symptoms.
Pregnancy tests negative.

I had my covid jab in July , which did mess them up a little but then they went back to normal . But now for the past two months they have been very short and very light

I will wait till after my bleeding stops to take another test but I doubt it's going to be positive as the rest have all been negative