Negative test but no AF

Just a little help required- my husband and I have been TTC for 2.5 years with no joy, I finally saw a fertility consultant yesterday had a trans vaginal scan she said I have a good amount of eggs on both sides but need another scan to see if my tubes are blocked ... I was due AF yesterday but nothing I'm normally early with AF never late I did a pregnancy test this morning-ve, I have been going to the loo a lot more having headaches dizziness nausea indigestion and very mild cramping about 5-7 days ago just wandering if anyone else has had anything like this but with a -ve test and what I should do now ??? Any help or words of wisdom would be great TIA x