Thanks for your question.
After reading Your problem it seems that you had been episodes of depression for which you are prescribe antidepressant and now you have the side effect of it.
All antidepressant particularly TCA and sometimes SSRI have got anticholinergic
side effect so you have dry throat, dizziness(due to postural hypo tension) and some of the SSRI particularly fluoxetine
have a side effect of gastritis so you have abdominal pain
also remember all antidepressant causes constipation
that also causes your pain abdomen.
About your suicidality i can tell no antidepressant produces suicidality it may be due to your disease process which can not control properly by drugs due to inadequate doses,wrong selection of drugs or may be you stop the drug yourself.
The main problem i dont know which drugs you are taking.Dont be frustrated because there are drugs which has very low this kind of side effect.So please visit your psychiatrist
,tell him your problem and also ask for any non pharmacological treatment means cognitive behavior therapy he can be thought for you.
But please don't stop the drug.It will increase your problem so much.
Dr Sourav Ganguly