First WIFI started crashing, now keyboard and trackpad followed! Help

Hello ifixit i need your help. I am travelling in souteast asia with my macbook pro (MacBook Pro "Core i5" 2.6 13" Mid-2014). First i started having issues where after heavy use or while using it for a while the wifi would get jumpy before crashing all together and the macbook would become unresponsive, needing to restart it to get it to work again. After this happening for a while i made a clean reinstall of OS el capitan. I thought this solved the problem but after a while the WIFI started crashing again.

After driving all day i noticed when i took my macbook out of the car, it was so hot from sitting in the hot car all day plus i felt like it might have turned on while in its sleeve. After trying to turn it on the keyboard and trackpad doesnt respond, when i plug in an external mouse the pointer is jumpy and doesnt respond as normal. After cooling it in a cool room for a day, i turn it on and works for five minutes before the wifi, keyboard and trackpad giving up on me.

I hope you guys can help me? Is it a software issue? Is there parts i can change? The click on the trackpad also stopped working several months ago. Thanks :)