If you have been trying to conceive for two months and have no specific concerns or underlying medical conditions, it's generally normal for it to take some time.

Irregular or abnormal menstrual bleeding can occur due to many reason like hormonal imbalances, stress, changes in contraceptive methods, etc. It doesn't always mean that its about pregnancy. If you are concerned about the possibility of pregnancy, it's advisable to take a pregnancy test to get a clearer understanding of your situation. 

After a hysterectomy, the ovaries may or may not be removed depending on the type of hysterectomy. If the ovaries are left in place, they remain attached to the pelvic sidewall and are typically connected to blood vessels called the ovarian vessels.

Without a physical examination, it is hard to really determine the reason. For this reason, you should be referred to a gynecologist who can perform a detailed check and can prescribe you medications

Yes the pain and burning sensation is due to irritation from the soap. Soap can sometimes cause irritation and disrupt the natural balance of the sensitive skin in that area. If this happens just rinse the area thoroughly with clean water and avoid using any harsh soaps, fragrances, or other irritants in that area. 

Yes, oral contraceptive pills can delay your periods. But it is advised to not use these pills to delay your periods for more  number of days.