He sounds like a good guy...I'm happy for you.
Two weeks in pain is almost certainly out of the ordinary...have you seen your doctor, by chance? If he caused an internal injury, it needs to be addressed ASAP.
Lack of lubrication may certainly have contributed to the discomfort, but even then it shouldn't have caused two weeks' worth.

My suspicion is that he possibly caused a tear in the musculature...nothing that isn't fixable by any means, but certainly worth checking out. Foreplay and making sure you're "ready" is a must...not only for comfort but for safety.
Again, I am thrilled the ex is out of the picture...here's hoping karma is indeed a thing.
Many hugs,
Harley