Have Hashimoto's and i bleed and get really crampy

Hi,
Welcome to ehealthforum,
The vaginal bleeding and cramps after masturbation that you describe could indicate underlying hormonal derangements, infective causes, PID, cervical erosion & injury etc. The exact cause for the symptoms that you describe can only be made out after careful evaluation. Consider visiting your doctor/gynecologist at the earliest for thorough examination and further evaluation to look for the underlying cause for the symptoms that you describe. Treatment as indicated (based on examination findings and investigations results) would be started to help you control the symptoms. Avoid introduction of any foreign objects in vagina. Avoid vaginal douching, or use of harsh soap or perfumes in the area. Use loose cotton undergarments and avoid use of tight fitting clothes. Be in regular monitoring and follow-up with your treating doctor/gynecologist and report any new/abnormal symptoms immediately. Drink plenty of water. Take adequate rest. Maintain healthy diet and lifestyle. If infective cause is detected, and if you are sexually active, get your partner also treated simultaneously to prevent chances of re-infection, and avoid having intercourse while being on treatment.
Take care.