I know this is a bit late, but I too had mono a couple of years ago. Eb virus, but complicated by the doctor prescribing me penicillin. I ended up with hepatitis, an enlarged spleen and an itchy all over body rash. I was in hospital for 10 days and off work for 3 months.
I was very jaundiced and my alt/ast? Level reached over 1000. I was a normal colour within a couple of weeks, with just a bit of yellowing in the eyes.
I may also be allergic to penicillin after I recently took this for an ear infection and ended up with swollen itchy hands and feet (interestingly these were the only parts that were not affected the first time I had mono!) I was not allergic before, but it seems that I am hypersensitive to many things now whereas before the illess, I was perfectly normal and healthy.
My liver levels are also still very slightly elevated, but was told that this was nothing to worry about.