I hope this isn't a really silly question....but when should you worry about breathing problems? I am having tests for MG and part of my symptoms include a pressure sensation in the centre of my chest along with a feeling of not being able to fully take breath, or taking the breath in stages (like how you breath when really crying) I sometimes notice it in a morning and my ribs can ache a little but usually it's when I'm trying to do too much (like get me and my 2 little ones up dressed and dropping off at school, after shower and drying hair or setting up at work etc) once I sit or rest it usually passes after 20mins? Thankfully I have no real problems with swallowing etc so I'm not sure if this is a cause for concern?

Thanks for all of your help