Hi Emma, I just saw your post and wanted to say that I was the same after my operation in December 2013.
I was very depressed for several months afterwards and only got better in June last year. I also suffered from severe depression for years as a child and teenager due to having severe Endometriosis pain from the young age of 11. I didn't get diagnosed until Dec 2013 (age 28 at the time) after my partner and I tried for a baby for over 1,5 years.
On that day I was in surgery for 3 hrs and then got told that we would need IVF to conceive. After that I went into depression and due to being on the IVF waiting list Drs said that I couldn't go on any medication.
I am okay now as we are currently undergoing our first round of IVF, so I am excited and more optimistic. But my partner and I had a rough patch of not talking much for months after my op. After a while we got ourselves out of it by talking about it and deciding that our relationship is the most important thing!
Eventually I started doing things that I enjoy such as trying to do things that are relaxing.
I have a bath every night with lavender oil, read a book, walk our dog, I listen to a hypnotherapy CD by Helen McPherson (she is brilliant!!!). I do this to help me through my IVF but she does others as well. There are lots of hypnotherapy CD's and I find them very helpful. You get them for £10-£15 from Amazon.
Also I like to watch movies, go to the cinema, and meet up with friends just to take my mind off things.
I cook & bake a lot which is something I really enjoy and DP is happy, too as he gets to eat most of it haha
Okay Emma, I hope this helps a bit. Its so difficult to go through this but I hope you will feel better, soon. Talk to your partner about it as whatever it is that leaves you sad and depressed it affects them, too. My partner could always feel that I wasn't happy and I was the same as you and didn't want to burden him with it. But once we started to openly talk about it - I got so much better!! Now he knows straight away when something is up and tries to cheer me up, especially as we are going through IVF. It does help.
If you like, message me if you need someone to talk to Love Ines xx