I'm pregnant on my second trimester and i'm still very tired moddy and vomiting a lot . is that normal?

Not unusual: It could be reflux related; zantac (ranitidine) is cheap, try that. The prevelence of mood and stress problems in pregnancy is around 20-30%. Ob docs are generally surgically minded folk and not too good with the psycopharmacology. Consider Mirtazapine 15 mg per night, it helps with insomnia, nausea, stress and mood and may be a suitable drug. Mass general women's psychiatry is an excellent site for safety.