Thanks for your query at DoctorSpring.com.
You have not mentioned about the pattern of your periods.If you HAVE skipped a period, then take a pregnancy test, that will easily exclude or tell you about a pregnancy.
If you have abnormal cycles, then a blood HCG pregnancy test or a pelvic ultrasound performed transvaginally will tell you about a pregnancy even more clearly.
It will also exclude an ovarian cyst , or a pelvic infection, that could sometimes cause such pain ( although the pain would not be high up )
Having had a gall bladder issue earlier, then there could be some recurrent pathology in the liver or gall bladder area that could cause such tenderness and bloating of the upper right part of the abdomen.
Unusually, bowel or appendix related problems also can present this way.
I would recommend a visit to your GP, alongwith complete abdominal and pelvic ultrasound and a blood work panel ( complete blood count, thyroid test, liver and renal functions , lipid profile ) to assure you that all is well.
Following gall bladder surgery, sometimes such tenderness occurs due to adhesions after the surgery, and then you need not worry.
Schedule an appointment when you can, as there is no emergency.
All the best. Please feel free to ask any further follow up questions.