Sensitive* BFP and cramping

[CarT16]

Hi newbie here!

We got our BFP from 4th FET confirmed on Friday with our beta test at 9dp5dt but I cannot help but feel anxious and petrified its failing already!I've suffered an early loss before and a chemical pregnancy and feel these constant dull cramps (no bleeding or spotting currently) are how these both started. I've had constant cramps since last night and all of today with some backache. Has anyone had this and everything has been okay?

My beta was also 92 and I feel like this isn't high enough and I know I'm being silly. Just can't shake off this really negative gut feeling. My clinic don't repeat betas and viability not due until 17th Dec which feels a lifetime away. If anyone has any words of wisdom or advice please let me know! Thankyou