Right side under boobs could be gallbladder pain, it could be referred pain travelling down to your bellybutton. Have you noticed it flares up when you eat any fatty foods ?
My gallbladder pain was referred pain to the opposite left side, Drs thought it was my stomach but after camera down and nothing found I paid for private scan and they found lots of stones. My pain was so bad I passed out. Best thing I did having my gallbladder out 😊
Lillith.