Pain in eyes

I have an annoying pain in my eyes It comes and goes but it's really bugging me I've been to three or four different eye doctors and they seem to think nothing is wrong or can't seem to see anything..

I was told it might of been an infection and was given drops well that didn't work out and it still hurts

I was told my eyes arent getting enough oxygen so I they prescriped me to different contacts (acvue with hydraclear) now I admit my eyes feel better when they are in but not 100% either and its back to pain completely once they are out.

I do not know what the pain could be or how to fix this? The only thing I could think that caused this was I use to sleep with my contacts in for about 2 months back in the day when I didnt know better..

Anyone have any ideas on how to help?

Thank you