My porcelain veneers affecting my bite, please tell me should I be worried?

Hi:Adjusting the bite on fillings and veneers after cementation can be normal,  However, you have to make sure to get the bite adjusted as soon as possible so not to put too much pressure on your new veneers.Best,Dr. Maddahi

Give your dentist an opportunity to fully adjust your veneers. With porcelain, some adjustments can be made out of the mouth and some in the mouth. A little anesthetic will allow him to fully adjust them so your occlusion( bite) is back to normal. They will also be polished smooth at the end. 
It is unlikely that they will be "ground" through the veneers while he is adjusting. If that happens, they can be remade differently. The take home point is that your bite should be normal, biting on your back teeth fully and the surfaces should be smooth. 
Adjustment is part of the final cement action process. 
Good Luck!
Dr Ebner

Short answer is yes. When veneers are touching first, your bite is off and you are damaging veneers and opposing teeth alike. Have them adjusted to an excellent bite that is comfortable and healthy. The bite (occlusion) is very important when for the longevity of your restorations.