I'd hope/assume the OP meant 2-300mg per day? The minimal dosage we can get in my country is 50mg caps of Tram, although whilst travelling I've come across 30mg in combination with paracetamol etc.
Still - Tram binds to your receptors like shit to a blanket (excuse my french) - so I can understand and sympathise. However, you're looking at a few weeks of nothing but liquid in the toilet bowl. I also get the concept that you feel it may be a flu/stomach bug going around given the symptoms - which would direct me towards thinking this would be your first opiate w/d? First two times I thought I had the flu, also.
Using an opiate to come off an opiate (synthetic aside), is never really good news - you're going to be left with that rock bottom boredom and physical/mental hardship for weeks once the morph runs out - unless you taper very wisely.
Tramadol is one of the ones that varies GREATLY from person to person - personally, I get minimal w/d's from it - I'm pretty lucky with soft opiates in that regard - never used the needle more than a couple times in my life so I wouldn't know going in that deep.
Get through the electric jolts, depression and general negative aspects of the day-to-day, in 2-3 weeks you'll be glad you stopped.