Feeling depressed or is it SSRI withdrawal syndrome??? PLEASE answer!?

I have been feeling so low and depressed lately, along with anxiety. I haven't been feeling like myself. I feel so scared/empty/unmotivated. It's really scaring me. I have been having negative thoughts to the point of even thinking about suicide cause I am just tired of life and feeling like this. I feel like I don't even talk, like I am not talkative as usual. I don't know if it's due to stopping medication (antidepressant SSRI)? I have stopped these SSRI's 4.5 MONTHS ago but I should not be having withdrawal symptoms this long, plus these new symptoms just "intensified" about a month ago. I was definitely not like this before meds. I only took the meds for several months due to situational stress in life. So I don't know, could it be "prolonged withdrawal syndrome"? I am not feeling like myself and I wanna be back to being my old happy emotional self. I don't know what to do. I'm scared!