Hello, Thanks for letting us know your health concern. I have gone through your query. You do not seem to have a missed period, but some intermenstrual spotting. If you had a negative blood test for pregnancy, this is conclusive most often. Hormone imbalances can also lead to similar picture and need to be investigated. I will be able to comment better if you can upload your reports. Gall bladder problems can cause your symptoms but not the breast tenderness. A sonogram of the pelvis preferably in the trans-vaginal route is needed to know the status of the pelvic organs. Further management can be planned accordingly. Hope this helps.