It is best not to shave during chol ha'moed.  You MAY shave if:

• You normally shave every day, and
• You shaved before the Jewish festival began.

Note Even if you only shave 2 or 3 times per week instead of every day, it is still considered as if you shave regularly.
Note You may shave during omer if not shaving might cause you to lose your job or otherwise incur financial loss. A large financial loss is subjective to the individual's actual wealth and also to that person's perception of what is a large loss.