I need new golf clubs and I am 5'5 should I use mens?

It completely depends. Are you a lady golfer, or a junior golfer or are you a male golfer? If you are a lady golfer, I would still recommend ladies clubs, this is because you will need a quicker swing speed and need to be quite strong to use mens clubs, and using them may hurt your game instead of improving. If you are a junior golfer you have two choices, either get a set of ladies clubs and use them for a while until you grow out of them, or get a set custom fit. You will probably need an inch or two taken off them depending on how high/ low you hold you hands. You will of course grow out of these, and you could get them extended and bent when you do. If you are a fully grown male, then yes, you probably should use mens' clubs, again custom fitting is your best option and will hopefully help your game.