Concerned about my period.

So for context: I was due on my period on the third of march Im not pregnant (2 negative tests)

Basically, ive been under some stress lately, my Dog was ill, assignment deadlines etc, My last 3 periods before this one came weeks/days earlier than the due date.

My issue lies here: im a very anxious person and always expect the worst, i can't shed thr fact that my period hasnt come yet out of my head, or if its even caused by stress like i think it might be.

Please if you have any insight to offer me id greatly appreciated

Edit: Is there any signs i can look out for that would indicate my period is on its way?