Fear of knowing what's coming!!

So I went to the gym today, for the first time since the day I went into labor with B. (He turned 6 in October)! I have decided to join a gym. After a year of being in Las Vegas, I have decided to make the leap! I used to go to the gym 5 days a week, but when I had my son, I had to choose between being a stay at home mom, and a gym membership.
 I had been running, but because of my husband's work schedule, I wasn't finding time to get in a run. I couldn't leave my 2 year old while I went running, and wasn't willing to get up at 4 am to go. We came to the conclusion that in order for me to be able to workout, I needed to start going to the gym and with a childcare attached to it. So excited for this!!
 Well, I pushed myself so hard (my competitiveness coming through) that I almost threw up. (For me, the sign of a good workout!) I am so tired already, I am afraid of what is coming tomorrow!! Here's to a new lifestyle!