Do you go to the hairdresser often? What do you normally get done?
I get my hair washed and cut at the hairdressers every two months.
I have just tried to simplify your sentance, which was fine in general, but this 'reads' and 'sounds' better.
I go to the hairdresser every two months to cut my hair. Sometimes I go to the hairdresser only to wash my hair.
Remember to add a space " " following punctuation.
For example, "... my hair.Sometimes..." --> "... my hair. Sometimes..."