Device wont charge at all!

Recently it has been getting harder to charge my phone. I have tried another cord, different outlets, the computer and even charging in the pick up. As of yesterday it will not charge whatsoever! I have turned it off taken the sim out, used canned air to blow the connection place on the phone, tried other cords (my husband has the same phone), nothing works. I have also tried holding the power button and the volume button (read online) really nothing works!!! I really like my phone and need it because it the only contact some people have for me. I would appreciate help.