When I rest on my right side (putting pressure on the ribcage) it makes something which feels like a swollen muscle pop out at the vey top of the abdomen area, just under my right ribcage. It is not painful but I have been experiencing nausea, gas and alot of things I assumed was all apart of my anxiety. When I put pressure on it, it kind of pops in and I can feel a click in my chest, then when I take pressure off it comes back out again. When lying on my back or being in any other position I cannot feel anything (it feels just the same as my left side).. This aswell as alot of weird symptoms has me worried. I'm getting very worried about this and I am going on holiday in a week for 3 weeks so wont have time to get checked out for anything serious before goin (I hope it doesn't ruin my holiday).. Any help at all from what I have mentioned?? Please help if you can