Hey i am a 21 year old female and everyday for the past 3-4 weeks my abdomen bubbles and cramp , i dont have a std . why is this happening?

Colon cramps: Really sounds like colon cramps as a source for your symptoms. Colon happiness can be really tricky, a balance of stress, variable tolerance to different foods, exercise, and consistency of bowel movements. It is common to develop symptoms like this in the 20s. You might try a probiotic or some fiber supplement as a start. See your doc if not improving, especially if getting more severe.