Cysts can be either on or inside the ovary. It depends on the type of cyst but there are always exceptions. Sometimes the whole ovary can be wrecked, other times it is possible to just remove the cyst and leave healthy ovary.
A complex cyst is a cyst containing both solids and liquids. For dermoid cysts the solids could be hair, teeth etc, for cystadenomas it would be mucus.
I dont know what is "normal" period pain, I think it is most common to have pain just before/first few days of the period, but I believe it is abnormal if it lasts much longer than 3-4 days. Cysts can cause pain as well. I guess you will need to compare your pain to what you had before you got the cysts.
You really need to chat your surgeon about hysterectomy vs cysterectomy and everything in between. I see you are 25, so the surgeon ought to do his/her best to save what s/he can of your reproductive organs. The ovaries play a huge part in your physical and mental well being, not just for conceiving. The womb doesnt produce nearly as many hormones, but you need it if you want to get pregnant. Personally I would make sure to keep the womb and as much ovary as possible.
Cysts can make you gain weight (the weight of the cyst(s) themselves and bloated appearance). I ended up loosing weight due to eating problems caused by my cyst. If the cyst cause hormonal problems I guess it could affect your weight as well.
I was on liquid food after my laparotomy, started eating solids when I could empty my bowel on the 4th day post op. Soup, jelly and ice cream! A bit of porridge is manageable as well. You may be able to eat more solids or start eating sooner than I did though, I was in a bad state.
Good luck, I hope everything goes well
Hiya I think cysts are On the ovary, what are your symptoms? As I think I may have one, I have pain where my right ovary is , get like a pulling feeling, and feel very bloated. who'd be a woman hey : (