peace of mind pls respond

Hi. I'm 33 I had my "tubes tied" this last march. I always psych my self out when I have my period. However, this time around I'm a little nervous. I'm only a day late!!! But...I have experienced nausea in the morning through out the day and it has not gotten any better any worse in the last week. Also lack of appetite. Which is strange because I love food.  I have experienced head ache with no fever. I do have a cold which is causing congestion but I have that under control with meds. In the last week I have slept a lot! More then normal. And my feet and back are killing me big time. I am loosing my mind or is this just me being sick???