I feel really sad for you, I too have a hard time with my mother even though I am older and have children of my own she has never approved or supported anything I have done good or bad in my life. Your living situation seems very crowded and when you dont have any space to truly call your own it makes it seem that much more stressful, which is probably why your chest hurts, I was in a very stressful situation about a year ago and was rushed to hospital bc I thought I was having a heart attack it was stress and they told me it would continue until the stress was gone. If you wanna go see your bf with YOUR money I think you should the break from home will most likely do you good. I wish you the best of luck and please keep us posted