Testing anxiety

I'm 13 dpo from our 2nd IUI. I tested at 10 dpo and got bfn. I know there is a chance that it will be positive tomorrow, but its a small chance. I just know I'm going to be devastated and so will my husband. Next cycle will be the last cycle our specialist will give us medication for. I just... I dont want to test and see another negative. I cant take any more! I know, I know, stay positive, you're not out till af shows...