What are the Chances...(+ FRER mentioned)

Hello,
I can't believe I am writing this.
Today is Day 25 in my cycle. I usually get AF every 30 days.
The past 3 days, I've been feeling "off" Queasy. I haven't really had any AF cramps which is unusual for me because they start around day 20 and go for 10 days until AF.
I just took a FRER and it's positive.
I don't want to get my hopes up because it's EARLY, AF is due on Tuesday. But wow, that line turned dark FAST!
The directions said sometimes a false positive happens, so I am holding my breath.
I called RE and am going there in the am for a Beta.
Also, I have some left over endometrin from a cycle with Dr C, should I insert one?
This would be crazy because I JUST decided to go ahead with another sono saline and possibly have this fibroid removed.
I'm so scared and hopeful.
Thank you for reading this.
Ahhhhhhhh!!!!!!!!!