What Could Be The The Reason Of Ivf Failing?

Hello Doctor, I am Janaki from Chennai currently residing in Bahrain. 3 IVF cycles failed for me (all 3 cycles I did in Bahrain). My age is 30. I have chocolate cyst and taking Eltroxin 50mcg. Every time during the cycles my eggs were low in count. 1st ivf cycle 4 eggs (2 embryo transferred), 2nd ivf cycle 2 eggs (2 embryo transferred), 3rd ivf cycle 2 eggs (one embryo transferred). 1. 1st IVF cycle failed - The reason for the failure what my doctor gave was low egg count. So he prescribed DHEA for 3 months. I nearly took for 5 months but got only 2 eggs. 2. 2nd IVF cycle failed - He said implantation may be a problem. So, he told that will do endometrial scratching and he did before my 3rd cycle. 3. 3rd IVF cycle failed - only this week it failed. Still not yet met the doctor. I really do not know what really going wrong with me. Doctors are not considering the cyst. I did a search in the internet and found that Immunologic Implantation Failure because of Natural Killer Cell will be a problem for patients with endometriosis. I have spent all the money what we have earned here. One more last try we can do after few months. I am so much stressful and no words to explain. Please suggest me what can I do next. Kindly help me. Thanks, Janaki Kesavan