You don't want to know how I get when the month's nearing it's end, and I'm broke.
You don't want to know how I am when the month's nearing it's end, and I'm broke.
Or
You don't want to know what I'm like when the month's nearing it's end, and I'm broke.
Are all the above sentences grammatically correct? I looked up the several ways get can be used, and came across one that suggest it can be used instead of be in certain situations, and I've actually heard people use get as it has been used in the first sentence, so I can't seem to be certain that it's okay to use it that way. Is it?