Question for experienced quitters

I stopped taking Opias (about 2-8 tabs per night) and shots like 3 days ago cold turkey. I had only picked up the habit for maybe 2 weeks again but I've been hooked on leaf before as well. Lately I've been feeling extremely emotionally upset and a massive sense of impending doom. Is this a normal withdrawal symptom or am I just having some sort of episode? Everything just isn't hitting right, like I'm getting no pleasure from anything.