anxiety

is it true that coffee can worsen anxiety? i have been feeling so tired these last couple of days and im not really a coffee drinker.. but it's something that ive resorted to, to help me feel more awake for work. but ive noticed it makes me feel more anxious and jittery every time i drink it. ive heard of coffee not being good for people who deal with an anxiety disorder but im not too sure... has anyone with anxiety ever dealt with this?