feeling frustrated today

So...I think I overdid it yesterday.  I had the audacity to go have lunch with my son at school, run to Meijer & Target, do a couple loads of laundry, and cook dinner.   My arms are very sore today.  I had big plans to get up with my kids this morning (which my husband has taken over so I can sleep) and make them a nice breakfast before they went to school but had to let dad give them cereal because my arms are just too sore.  I had a couple of friends ask me to breakfast this morning but had to say no because I just dont have the strength to get ready.   This loss of doing whatever I want whenever I want is just overwhelming sometimes.   Repeat to self:  its early days...its early days...its early days...