See to that you are using contact lenses from a good company. Try to use coopervision contact lenses they are supposed to be very comfortable.
You can use preservative free eye drops like eyemist
e/d when you are using contact lenses to reduce irritation
before undergoing lasik a test called corneal topography will be done if the results are fine then you can undergo lasik without any problem. Recovery time will be 1 week to 10 days. Most common side effect is haloes around headlights during driving at night time. Mild irritation is experienced by few.