Any disadvantages are minimal and have mostly to do with the hassle of keeping track of what money is with what bank account. (money.stackexchange.com)
You may even want to start a pregnancy journal to help keep track of all the changes that are going on now. (pregnancy-info.net)
For several months I've been vegan, although I don't keep track of how long exactly it's been. (healingandeating.com)