better today...will it last?

I'm feeling a bit better today. I worked out for 45 min on the bike & elliptical, and I didn't feel totally thrashed at the end. I'm still feeling good now, at lunch time, but how long will it last? Will I feel decent tonight after work and a busy afternoon? I'm planning to make Christmas cake with a friends' recipe, take Calvin to Kindermusik & go to Diva's Cupcakes with Michelle, do some laundry, make dinner, and take Michelle to sign up for ballet lessons. Just the usual...but lately it's been too much to do the usual activities. I know I'm not 100% yet, but I do feel there has been an overall positive trajectory over the past few weeks. Maybe I just think that because today is a bit better? Time will tell.