Hang in there! I am sure it is quite common....it is here anyway! DD1 stopped napping at home when she was 2 - the more stressed I got the more wound up she got. We tried naps together and having quiet time for an hour after lunch. She loves TV and I am mean and don't have it on so this was her time to watch something quietly whilst lying down. It just gave me a chance to recharge - she also was a very bad night sleeper and has only just improved at almost 3. We tried heaps of things but she was just not ready to sleep through. It is tough and exhausting but it will pass. You are doing a great job.