Creatine levels take the best part of a month to return to normal physiological levels, and this is a verrrrrrry gradual process.
So any big changes are psychological. Remember that and lift hard - doesn't stop you having bad days, but also means you can have good ones.
You should not see any changes in strength. What you might see is that you cannot do the last rep of each set or so, when a month ago you could have.
I lost a lot of strength cycling off it though...