Racing heart, sweating palms, restlessness? Are you having a panic attack or is your coffee just kicking in....?
Unfortunately, it's not always clear what's going on. When I have a stressful day, I'm likely to self medicate with large amounts of caffeine for the "energy and mental stamina." Both stressful situations and caffeine consumption increase your body's stress hormones which, in turn, can make you feel anxious. So if you're suspicious that you're morning cup of joe is responsible for your unstable and "freaked out" mood, you're probably right.
The problematic effects of caffeine
While many people can get away with consuming large amounts of caffiene with no real side effects, those predisposed to anxiety may have their symptoms exacerbated. This is due to the way that caffeine affects the body. For example, lack of sleep can lead to anxiety, caffeine can cause lack of sleep. See the problem? There are actually several areas which caffeine can blow the doors off your anxious behaviours (or muddy the waters making you wonder if you are actually anxious) to the point that the DSM (the encyclopedia of mental disorders) actually gives the affliction a name: Caffeine-induced anxiety disorder.
Increased heart rate
Increased release of stress hormones (cortisol & epinephrine)
Detox. Theanine. Smaller amounts of caffeine (spaced out)