I'm curious if maybe drinking so much caffiene might have created such a reaction? I drink about 12 cans a day.
Quite possibly. Even if it didn't you should avoid caffeine as it worsens anxiety disorders. Twelve cans is a lot of caffeine.
Also I read an article that claimed that people with diarrhea (chronic) sometimes have too much serotonin and constipation is from too little.
Serotonin certainly plays a very significant part, but it isn't as clearcut as that. Less than 2% of the serotonin made in the body occurs in the brain. OTOH, the gut makes and uses about 95% and has its own brain, the enteric nervous system
which links directly to the one between the ears via the vagus nerves
which link the brain, heart, lungs and GI tract and are the target of electronic stimulators
to control treatment resistant depression (and also epilepsy). Curiously, it seems that the ENS is the more influential partner in this arrangement. Serotonergic antidepressants can affect the ENS, especially in the first few weeks, however, this results in constipation as often as it does diarrhea.
I also took an aspirin about 1 hour before the vomiting began.
Which could account for the vomiting, the blood in the vomit and also diarrhea. If you have GI issues then aspirin and other NSAIDs should be avoided. Also be aware that SSRIs and other serotonergic ADs have anticoagulant properties, so avoiding NSAIDs is even more important.
And yeah with all the things dr dx me with I know I have a very long road ahead. I'm feeling more depressed since I started therapy and we haven't even really got past the initial eval =(
Patience is a very desirable trait for those with anxiety and depressive disorders. There is nothing quick or easy in overcoming them.