Trying to concieve. In my case?

I am trying to concieve since jun15. I have regular 28 days cycle and no pcos/pcod. I never had any medicine till Dec17. Got laproscopy done in dec17 and found that i had grade 4 endometriosis. With everything cured in the procedure we tried without any medicine from jan18 to jun18. In last 3 cycles (jul - sep) i was prescribed letroz on day 3-7 and ultrasound from day 10. I got hcg injection (5000 in 2 cycles and 10000 in 3rd cycle) when follicle was 17-19mm. But in none of the cycles my follicle ruptured. It ended up increasing to 37mm and eventually became cyst. I also got u/s on day 2 of next cycle to ensure that there is no cyst from previous cycle. My question : 1.  is there alternate way to induce ovulation in my case ? 2. Considering my history of endometriosis is there some other procedure that can be followed. I understand that IVF is the easy bet. But is there anything else that can be done. 3. Lastly, does follicle ever ruptures to release an egg once it is beyond 30mm.