I am on effexor withdrawal

I have been on Effexor for around 3 years on 75mg. I am also on Wellbutrin xl. My doctor reduced my Effexor to 37.5 for one month and I was doing fine but my insurance ran out for the year and effexor is so expensive that I said to heck with it I am not refilling my perscription and I'm getting of this stuff! Oh my gosh I had no clue what I was going to go through. I have been having what I noticed alot of people on this forum call Brain shivers. This is not fun. I also cannot stand the smell of anything (good or bad). My stomach is a mess I cannot stop crying, no energy at all, no appetite, cranky cranky cranky,dizzy, oh see I'm crying again! aaah!. I stopped taking the 37.5mg 6 days ago and I am going nuts. I've never been through anything like this in my life. I've never done illigal drugs so this is insane to me. Can anyone tell me how long I can expect this to last cause I know everybody's body is different. And what kind of Benadryl do you take?. I refuse to go back on this poison. The messages I have read on here are so helpful I can understand more of what I'm going through and knowing I'm not alone helps also. Support is what we all need and we all need to be strong and thats what I'm going to do. But if someone can possibly tell me how long I will approx. have to deal with this will be very helpfull. I will also keep posting on how things are going. Oh see here I go again crying....... :'(