Strange pregnant like feelings with a negative test result now very painful please read . Very weird?

Okay hi . Im 27 and in the month of March me and my spouse split for a month during that time I was with my ex a few times . By mid march for 2 or 3 days i had menstural like bleeding but lighter . I got back with my spouse first week of april and it is now first week of may still no period so a week ago i took a pregnancy test and it came back not pregnant the whole few weeks i get constant cramps every now and than in my back also have had tender breast not much though i have gained maybe 5 to 10 pounds in a month more stomach fat . I do eat a bit though i always have im not over weight i am 5/7 . 135 lbs . any way i went and started taking vitamin C to start my period with nothing and added black cososh or how ever you spell it . for a week since my negative test . and within the last 2 weeks my stomach is very crampy and makes a weird grumbling sound as if im hungrey even after i eat Also have the constant feeling of being hungrey but dont feel the need to eat . I feel constantly bloated very uncomfortable . And since late evening yesterday ive been getting weirder cramps stomach pains first it started off menstural type cramps light in the front and back and starting getting stronger around my mid stomach its not a normal feeling along with a achy back . the pain will either stay for a few hours if i am awake and busy and seem to get stronger more painful when i walk or do house work . my store bought pain medication dont help at all . my history with mensturation is very weird where i had it for a year staright of mild to heavy . always off and on along with strong cramps . I am at a loss and not sure what this could be . i do also have a history of ovarian cyst that was the size of a foot ball . my doctor is actually kind of dense with actual problems besides colds and flu ..so please please any advice or tips would be appreciated .