When Can I Try Again For Pregnancy After Having A Miscarriage?

I had a natural miscarriage about 4 weeks ago, the bleeding stopped at about the end of week 2, but I have had occasional spotting for a day here and there, but what is worrying me the most is that I have had some pains and twitches near my ovaries for the last 2 weeks. Nothing serious but I would like to try again later on. Also please advise when I can start trying for a baby again would 3 months be too soon? Please also advise on the ovarian pain. Sorry forgot to add that I didn't have a D&C, might I still need one?