TTC help

Hey ladies, I was hoping you could help me out.

I had my IUD removed Oct 2nd, and my BF and I have been trying to get pregnant ever since.

My period has bee right on on schedule up until this month. I use two ovulation/period trackers. The one said I was supposed to start the 6th and Glo said the 7th. Well its now the 11th and still no period.

My boobs are very tender, and I've been having nausea and pretty fatigued by the end of my work day...more than before. I've had no spotting and some slight cramping and even have had sex and still no period.

I took one pregnancy test and I thought I saw a faint line so I waited a day and tested again with a different brand and got a BFN.

I don't know what to think or do. Has anyone ever had this happen before?

Thank you!