Ghost touching problem on my iPhone 6

Hello, today I faced the problem which is ghost touching.

First of all, the sensors was ‘laggy’ when I was connecting (e.g aux) in my phone like 1-2 months ago, now the problem became bigger as it started to lag continuosly but not so much. But today when I woke up and turned the screen on and unlocked it afterwards, I noticed that same apps (messages, genius, weather and few more) were opening by itself, if I open safari or messages the phone types random stuff by itself like gggfffff and stuff like that. I tried resetting my iphone but it didn’t help, as well as erasing the settings. I bought the phone like 2 years ago or so and dropped it only once, it was actually nothing since it dropped from small height and the phone had light case and an expensive screen protector on it, so there was no visual damage and even the phone was working just fine after the time I dropped it. Any solutions?