I would like to start by saying you have been brave and resourceful - you should be proud of yourself.
Now you are on the systemic and local Oestrogen things should gradually improve but it will probably take time.
If you can, I'd try to get diet and exercise optimised and really relax as much as possible to allow the hormones to work their magic.
Once spring is underway, get out in the fresh air and sunshine to get the Vitamin D - if you can do brisk walks of 10-15 mins, 3 times each day, then this can work wonders. I do hope you are taking vitamin D and magnesium supplements as these are vital for calcium absorbtion. The symptoms of vitamin D deficiency are: fatigue, lowered immune system and low mood - so it's a vital supplement.
You might want to review the Sertraline? - as you start to feel better, maybe you can begin to wean yourself off this slowly to see if you really need it.
I wish you all the best - you are in the right road. DG x