Needing some advice

*TRIGGER WARNING*

So... This is gonna be long but I'll try to shorten it.

4 years ago, in the space of a year I suffered 3 MC's. All the losses hit me so hard.

It caused the breakdown of my relationship and for him to cheat and get someone else pregnant and leave me for her. I felt like I was a failure.

Skip to now, I recently started seeing someone who treats me like a princess. I haven't been watching my cycle as I had an IUD fitted 2 years ago. I've been regular since.

Me and SO DTD on the 23rd. And I'm now 4 days late.

I'm terrified of testing due to my previous losses but know I need to because of the IUD.

I've been having clusters of headaches, nausea, tired no matter how long I sleep, terrible back pain.

I just need some encouraging words or something.

Thank you