I begining to loss and feel good!

I started using MFP again about a week ago. I entered my last known weight from the Doc which was 180. I decided to weigh in at home on Friday and was 176, Yeah! But today is my one week mark and I chose to weigh in again...172, even bigger YEAH!! Now I don't want anyone freaking on me that this is to much to lose in a week, so here are some details, my last doc visit was about 2 months ago, so it is possible that the 176 is/was my actual starting weight last week. However, MFP has me eating 1500 cals daily and I eat back most of my exercise cals. I am just excited that I can already see results and it in courage's me to keep going. Gotta make some better choices in the next few weeks but I'm moving in the right direction, YEAH ME!!!