Rahel,
Its been 7months since my surgery and my tongue is still a numb where the surgery was! I did have radiation and chemo though. I still cant eat very cold or hot things. So all is normal for you at the moment . Like Charm says, think in months not weeks, dont be too impatient (although that was my problem as well and my husband kept telling me the same thing). It will get better, just takes longer than we want it to.
Minh