I gave up soda pretty much a few years ago. I've always loved my coffee but I think I started drinking more after I got off the soda. Recently my routine was to have 2 12oz. cups before work & then 2 more throughout the day. I don't know if I had actual anxiety attacks but when I was stressed I would have what I call a "about to get hit by a truck" feeling. I heard someone else describe it as missing a step & almost falling down the stairs, startle or fear I guess. After a particularly excruciating day of feeling this non stop I decided to try giving up coffee even though I never experienced what people would call the "jitters" .I've been drinking coffee for about 30 of my 43 years & never thought it was a problem.
I switched to decaf a week ago & although I still have depression that awful physical feeling has all but disappeared! I really, really love coffee but I can jazz up the decaf & it's a small price to pay. Hope this can help someone else!