I'm reaching out to anyone who has experienced something similar. I'm worrying myself sick. 
when lock down happened I didn't really look after myself with my diet and drinking. I piled on 2st extra very quickly and have never been able to shift it. Fast forward a year later and whilst driving I noticed an uncomfortable feeling in my upper right abdomen, like my insides were squishing together, I adjusted my posture and it eased. It happened a few times after. This last couple of months I've had a change in bowel habits but this is not unusual for me. But the feeling of having an internal mass is now more dominant, I can even feel it when I walk. I am a hypochondriac, but this is worrying me. I've not had great health with my chest as last year I got covid, pneumonia and pleurisy all in 2 months so I'm breathless, crackly and tired often. I'm 39 years old. I've just booked myself a dr appointment for next Friday, I'm not sure why I'm posting here, I'm hoping even just writing it down makes me feel a little better. Thanks for reading