Every time i move, take a deep breath i get a dull like ache pain in my chest, (around the heart area). i thought it might be muscle pain. but worried?

Rib dysfunction?: Sounds like the common presentation for a rib dysfunction, ie the rib gets 'stuck'. This problem often presents with pain (often sharp or severely achy & worse with deep inhalation or exhalation.) it's easily treatable by osteopathic manipulation, if it is the cause. A proper history & osteopathic hands-on exam might be able to determine the exact cause.Manipulation may fix it.

Could be many things: Including an intercostal muscle strain(chest wall muscle strain). But it could also be related to irritation of the lung or lining of the lung/chest wall, or even the lining around the heart. This should be evaluated by a doctor sooner rather than later. If your symptoms become more severe or you start to feel short of breath, lightheaded, dizzy then you should seek very urgent help.

Be seen today: You may have chest wall irritation from coughing--but you should not take any chances and you should be seen in a clinic or emergency room today to make sure no heart issues are present. Have someone drive you to be seen. Good luck.