I had success with a medicated FET. I was too nervous to trust my body to do the right thing and couldn't bring myself to do natural FET. when we started the FET's I felt like I was just going through the motions and that I just had to get through my few frozen embys before being allowed to do another stim cycle. Felt like a big waste of time, but turned out not to be.

Have you discussed doing a medicated FET with your FS? I guess if it is MF then he may say there is no reason to medicate you, but it might be worth asking.

Sorry you are feeling so down about all this. It is horrible when you start to lose hope. big hugs to you hun. Be gentle to yourself while you are feeling like this.