Ttc symptoms

AF is due jan 5th usually I start getting sore breast and food cravings the whole "I think I'm pregnant but ik it's just period symptoms" by now and I have nothing?! I have been drinking mass amounts like I cannot get enough to drink one day I'm constipated the next it's loose. Against my better judgement I may take a test with fmu tomorrow:/ I'm going crazy with this wait!!!