I just decided to try and make my own starter using a method I found on the internet.  I started it last night, fed it this morning and when I came home from work and opened it, the smell almost knocked me out.  It smells like rotten eggs.  Is this normal for the first day.  I understand that there are other micros living in there not just yeast.  Will it start to smell better after a few days when the yeast take over and the bacteria die off??