I didn't stop using dipping tobacco before and after my FUE hair transplant. It's now 2 weeks post. Did I damage my hair?

It is best to contact your doctor about post operative care and instructions since each doctor has a different regimen.  Chewing tobacco should not have an impact on your surgery,

There's really no way to tell because we can't compare your hair growth to a version of yourself that didn't use tobacco. However it is known to impede hair growth so while I doubt you killed the hair completely, it's likely that you've negatively impacted it to some degree, depending on how much/often you used it.

Nicotine in any form causes blood vessels to contract and shrink down, and this can impede healing; this is why your doctor asked you to refrain.  Given the good circulation in the scalp it is not likely that there will be major problems but avoiding nicotine is better.

The use of tobacco is not a good idea because in theory, it reduces then blood supply to the scalp. Only time will tell and if you get good growth by the 8th month, then you will known the answer to this question