Ugh! Why?!?

I'm feeling so frustrated. I had 4 miscarriages before my obgyn would do anything- this was across a year. In August/September we did testing and everything came out normal but the dr wants us to use progesterone after I ovulate. Fast forward to now. Not even a hint of a bfp. I'm starting to lose hope. My dr says I have to go another 6 months without a positive to do more testing. I just am feeling defeated. Af is due 2/14 but all tests have been negative. Another month out