The first time I was on the Aza I was fine for months and monts on it, they did have to increase my dose up 200mg and that meant for the first 3 months I was on weekly blood tests, then two weekly, then monthly, then 3 monthly. Has this part been explained to you with regard to the regular blood monitoring? It did eventually cause an issue with one of my counts so it had to be stopped which was a shame as it really sorted the tum out. I am now on the sister drug to it - 6mp - and have been for about 6 months now and doing really well.
Hopefully this along with the Cimzia will be able to sort things for you too.