I am 43 my period was 27 days late and then only lasted 3 days. I took 2 pregnancy test 1 at day 19 and the other at day 23 and both were negative. Can I still be pregnant or is something else wrong?

At 43 it is very possible you are entering perimenopause or maybe even menopause.

If this is the case, you will notice your periods getting further apart and lasting shorter periods.