TWW!!!!

Hi I'm Rachel from the uk. TTC #2 out of my fertile window yesterday so now on the dreded TWW. Not sure what to do about testing. Do one early a few days before AF? Or just wait and see if she arrives? She is due  24th. This is my 2nd month of trying and I typically have a 29 day cycle with a 7 day period however this last cycle she was 4 days late and was only 4 days long. So I don't know if she will be back on time for a regular cycle or if that has moved everything about. I HATE the TWW.