Weird feeling in chest when letting go

[bastih]

Hi, I've recently moved to the letting go meditation where I just don't try to do anything, I even let go the desire to let go as Leo said in one of his guided meditations. This way works best for me in terms of not thinking during meditation but whenever I really let go I have this weird, heavy feeling in my chest as if my lungs were pressured. It's hard to describe it but it's in a way relief but also I can't take it for too long, it exhausts me pretty quickly. Did anybody experience something like this? I know Leo was talking about being superconductor where you don't even feel the negative emotions going through you but my experience is far from that. After this kind of meditation I feel better and more clear minded but still it's hard for me to stay in it for more than 15 minutes really. Will it pass with time? I don't feel many negative emotions, I don't really experience many emotions at all, I didn't feel really happy for the past four years but I don't feel sadness either. Should I just keep going with it or adjust it?