go to a doctor. six years would be a mighty long time to have an std. you should be going to the doc for an annual physical exam anyway. don't be scared, just do it and make a habit of it
Rash in the deep part of the tongue can any one help?
The only person who can diagnose your symptons is a physician. It sounds like due to practicing unsafe sex, you have contracted an STD (Sexually Transmitted Disease).
I hope this will be a lesson to both of you to either abstain from sex all together or practice safe sex. Who knows who you both have slept with that has an STD and all of you are spreading it like wild fire. Good luck.