Unsteady and Nausea

     I am scared tonight.  The unsteadiness and nausea is bad tonight I am worried that I have something seriously wrong with me again.  Only this time it seems more real because it is getting worse and more continuous.   The unsteadiness is hard to describe it is like I am off balance and do not quite have my footing.  I also have nausea it seems to come and go I will be nauseaous most of the day but still be hungery around mealtime so I am still able to eat.  What could it be?  I have thought that it could be hormonal, as I am still nursing my son and I have not started my period yet.  I have also had thoughts that it could be something way worse.  Should I talk to my doctor?  I saw her a lot this summer with different symptoms, she probably thinks I am a hypochondriac, and I probably am.  But I could still have something wrong with me.  I am unsure about what to do.  Please Lord help me to know what to do.