I did not wash my hair since the FUE 2 weeks ago, how do I wash it?

I am shocked that your doctor never explained the washing process to you. The recipient area requires daily washes to keep it free of crusts. I generally recommend the use of a sponge and supply my patient with a surgical sponge to fill with soapy water and press on the recipient area daily. By repeating this daily, all crusts can be washed off without any fear of losing grafts. If any crust are present, use a Q-tip and dip it into soapy water then roll it on the crusts.  That will lift them off without dislodging them but never rub them, just roll the Q-tip on the recipient crust. I like to see no evidence of any crusting in the recipient area and the crusts from the donor area gone in 7-10 days with daily washing.