8 upper porcelain veneers 10 wks ago, cant bite anything with front teeth, so painful and sensitive, what can i do?

It's hard to determine the cause of your pain and sensitivity through an online forum. The best thing to do is to return to your dentist for an evaluation. He/she will determine whether another simple bite adjustment is necessary or if you are in need of root canal therapy. Whatever the case, it's best to return to your dentist sooner rather than later. I hope this helps. Feel free to click to save my name below, in case you have more questions in the future.

You did not state whether the pain is chronic (occurs all the
time) or only when biting. If the pain is chronic, then the pulps or nerves of
the teeth have been compromised. This type of pain may occur before the veneers
were placed, and the problem has to do with tooth preparation (severely rotated
teeth requiring excessive tooth removal for aesthetics) or the condition of the
teeth prior to preparation (deep decay). If you had had no pain after the teeth
were prepared (reshaped for the veneers), then the problem is with the bonding
of the veneers to the teeth. At any rate, pain that lasts 10 weeks post-operatively
is way too long, and if the treating dentist cannot solve the problem, then you
should seek a second opinion.

Without pre operative radiographs it is hard to tell you what is going oni would suggest sensodyne toothpaste.   But if pain continues you may need root canal treatment