Kayla, I suggest you make sure that whichever specialist you go for has experience with recurrent miscarriages. The easiest way to do that is to phone up and ask.
I just did a google on Texas and recurrent miscarriage and a number of clinics came up...
It used to be quite common for doctors to tell women with PCOS they would never have kids but that is old advice and I don't think any modern educated doctor would say that anymore. It might be more difficult or take longer and there is a risk of infertility, but it is no longer an impossibility. As you can see in your own case you have fallen pregnant a number of times. Whether it is worth to pay out for IVF to speed things up is something to discuss with a fertility specialist but this may not fix the issue of miscarrying. It depends on what the underlying reason is. You mention low progesterone. This could be addressed by progesterone supplements from ovulation onwards or by taking more control of your hormones before ovulation (you already tried clomid, there's also femara, the option of stimming and triggering...). I don't know the details as I don't have personal experience...
Your doctor should run a panel of standard tests for recurrent miscarriage on you. Do not despair for the future! It is certainly feasible to think that next year you might be cradling a baby in your arms
As suggested, I recommend you pop into the rpl thread on here. There might be a lady in your area who can recommend someone and you will find a ton of info on there regarding tests and treatment.
If I hadn't read so much about nkcells on there I would never have gone to a specialist and received the right treatment for me. I was ready to give up yet now look how far I am!
We all know that having an mc is very sad so I hope you can take the time to look after yourself. Then, when you feel ready to, I hope you have enough info to start the next steps