Psychic abilities cannot be turned off, they are a part of you just like breathing or your heartbeat you cannot just turn them off.
If you are bothered by them you can always try and suppress them but that will only delay the data and if you do it for too long it can cause more than just a little discomfort.
Only thing you can do, at least that will not have negative effects is to:
1) Learn to ignore them
2) Learn to work with them
And I can tell you that neither option is easy to achieve.