Note 4 only charges at an angle or pushed in

My verizon note 4 that I got last summer in 2015 is suddenly not charging correctly. A few months ago I noticed my battery was draining faster and the phone would just restar itself sometimes. I wasn't sure if that was a problem with the battery or something but I never changed the battery and just started to carry a charger around with me in case it drained while I was out. Recently the battery would stop charging at like 85% and I would have to take it out and plug it in again in order for it to keep charging

But now it wont work at all unless it's charging at an angle or pushed in hard. It was working fine last night and I tested the charger and wall adapter and they worked just fine on their own so it has to be a problem with the phone, right? I also looked inside of the port on my phone and nothing looks broken or out of place so is the problem the battery? It's charging now but everytime it's moved it stops, please help me.