Talk to Gynecologist on Itchy Vagina

Hi i am 28 years old and and married and have 1 baby boy(1 year old)

From two months i get really itchy down there after 1 2 weeks. Its not infection. I dont have any kind of discharge. My skin feels really raw down there. These all thing started after having bartholin cyst 2 months back. During periods itch is unbearable. I get mood swings, headaches on daily basis, 1 dam bht garmi b lgne lag jati hai, gets really negative thoughts and then i get sad. I have back and knee and arm pain all the time. I am taking osnate d daily from 1.5 months. I feel like i dont have energy to do anything. I feel lethargic all the time. I have very low sex drive. I crave to eat sweet things. My weight is 86 and i am trying to lose it for 2 months and trying to eat healthy but didnot lose any single pound. I think i am having low estrogen level or maybe there is another problem Can anybody tell me whats the problem with me??? Right now my real problem is svere itchy vagina.