If and statement

If and statement help

I have a SS with 2 columns (dates).
in some instances column 1 may be blank, while column 2 has a value entered, visa versa or both columns may be blank.

My goal is to find the number of days between the two dates in column 1 and 2

*if column 1 contains text and column 2 does not, i'd like to find the difference between todays date and column 1 date

*if neither column contains text id like column 3 to remain blank

I have entered the following formula, but am getting responses of 40,000 days, can anyone help me figure out where i've gone wrong?

=IF((AND(A2="*",B2="")),(TODAY()-A2),(B2-A2))