Still HOping:
:hugs: This is a rough ride sometimes isn't it. But you are in the right place for some great support, love and help through this.
FYI here are some progesterone values:
Follicular phase: < 2 nmol/L
Luteal phase: 5 - 90 nmol/L
Post-menopausal: < 2 nmol/L
Your progesterone rises at ovulation and peaks 7 days before your period. It looks from your result that you did not ovulate. If you had your result would be higher.

Can I ask what reaction you had to clomid that made you stop? How long were you on clomid? In some women clomid can reduce the thickness of the endometrium due to its affect on the oestrogen however this doesn't usually begin to be a problem until 3 full cycles on the clomid. Often a month off is enough and then the clomid can be resarted. Is this what happened?

As you know the clomid helps to increase to level oout the hormones in the first half of your cycle and this increases the progesterone which in turn increases the luteal phase. If you can't take clomid there are other options. Has you specialist talked of any?

Clomid is the first step there are other steps. What have you talked of doing next?
ETA I would also ask for a fertility profile to be done also and u/s is helpful. Follicular u/s at around cd12 is often done...