Feels like something stuck under ribs

[JKW36]

Has anyone here felt this before? I'm visiting the doctors next week.
For context I am very overweight.

A few weeks ago when lying on my side in bed I started to feel a tightness in my left ribs. When I moved it went off. This has gradually got worse and now the whole area feels inflamed inside ( nothing visible outside). When I'm sitting down it feels like there is something under the bottom of my rib cage that my ribs are digging into, causing an uncomfortable sensation. You can't feel anything when pressed but it is painful when pressed.
Now when I go to bed I have constant pain when I lie on both sides. If I lie on the affected ribs it's a pinching pain. If I lie on the other side the affected ribs feel stretched. It's also causing shooting pains across my belly just under the skin.
I feel well otherwise. Any ideas?

Could it be costochondritis?

Sounds like when I had a gallbladder attack. Very tight and unpleasant. I ended up ringing 111 at my husband's insistence. Take care of yourself, I would definitely get seen just in case

Op said in the left side though, I've had gallbladder problems for 10 years and it's always been right sided stomach and back pain when having an attack, maybe I am wrong and pain can be felt everywhere but for me it was the right side pain, on the left side their is different organs x

@Zenab12 you're absolutely right, I remember feeling it in the middle as well

If you're overweight. Your liver can enlarge so it can be felt.