Multiple Problems with the iPhone 4s

This will probably sound very confusing, and probably never heard of, but i'll try my best to explain.

I came home one night, and my phone didn't automatically connect me to wifi, so I went to my settings and went to connect to wifi, but it was acting a bit slow and would freeze for a second or so. Once I did connect, it only lasted about 30 seconds before I was disconnected. I tried again and it did the same thing, connect for 30 seconds than kicked me off. When I went back to re-connect, it couldnt find any networks to connect to, usually when this happens i turn off the wifi and turn it back on, but this time it never turned back on, and I couldn't do anything besides open up my assistive touch and play with those options, the home and power button didnt do anything in the assistive touch.

I force shut down my phone using the assistive touch power button and the actual home button, and it goes to an apple screen, and stays there until i open the back and uplug the battery and put it back in. Once i do that it still does the same thing over and over, no fix whatsoever nor could I find any solutions online.

Does anyone think they can help me? or is it just time to get a new phone.