Please read, young with no experience but chest pain, please?

I'm sorry, but this is the beauty & style category. Post your question somewhere else, like the housing/construction/plumbing section. I'm only saying this because you might get more answers there. However, it sounds like you have a problem with your landlord. You should not feel blame for this because it sounds like your plumber, or the person who did the working, apparently did something wrong. Have your landlord call the plumber.