Married in 1998 is probably not long enough to collect alimony, since you work.
Do you have kids?
The only 401 K you'd have access to is monies deposited WHILE you were married, not for the rest of his working career.
In a 7 year marriage, it's probably a few thousand dollars...... you'd get half.
You might get $4 - 6 thousand at most. Not enough to buy a new car with, but enough to invest (or take a vacation)