Hello joethinam, welcome to Psych Central.

First of all many antidepressants have the side effect of erectile dysfunction, please see this link here Side effects of Venlafaxine - Depression - NHS Choices

There are many medications that you can try and there are ones that don't have such strong side effects, it really is worth checking back with your doctor about that.

CFS - extreme fatigue Chronic fatigue syndrome - NHS Choices

PTSD - a reaction to trauma Posttraumatic Stress Disorder (PTSD) - Psych Central

Panic disorder - anxiety/fear Panic Disorder Symptoms | Psych Central

If you are not sure what is going on with you, you might like to try these online tests Psychological Tests and Quizzes and The Sanity Score - Test Your Mental Wellness