Injectables instead of Clomid

I reached out to my fertility office requesting to see if it was possible to try injectables instead of Clomid just because I had tried Letrozole and my body only gave me 1 mature follicle my doctor wants at least 2 follicles to have a good <a href="https://glowing.com/glow-fertility-program">IUI</a>. He did give me the option to cancel or proceed with 1 follicle but he also only gave us 5% chance to conceive which it just didn’t make sense to us so we just cancel and my doctor said we can try again next cycle with Clomid instead. I am worried Clomid won’t work either and we would be force to cancel our <a href="https://glowing.com/glow-fertility-program">IUI</a> again. The reason why I refuse to try with 1 follicle is because our chance is low and we have been trying to conceive for 8 years until this day we are yet to conceive I don’t think 1 follicle will help us. She told me they at least try 3 cycles with Letrozole or Clomid before trying injectables just because my body can over respond. I just feel so lost at this point she told me I can speak with my doctor when I go in to check if I have a a cyst to start the process with the <a href="https://glowing.com/glow-fertility-program">IUI</a> again. I fear since Letrozole didn’t respond well that Clomid won’t either 😰