Kinda Nervous...kinda excited!

Well me and my husband haven't really been trying to get pregnant, because I've heard before its harder to get pregnant when your trying rather than when your not. I normally always get my period on the 28th of every month and it normally last about 3 days. I was supposed to start my period Jan 28th but I have not got it yet. Is it time to take a home test? What do y'all think?