From where I stand ... or sit

I had a quick appointment with the perinatologist today and was encouraged that the babies still look great.

• Baby A's heart rate is 140, Baby B's heart rate is 144 and Baby C (the kicking boy) is at 146. 
• I am at 18 wks but my uterus is the size of someone at 26 wks.; in 4 weeks I'll be the size of a full-term pregnant woman

Unfortunately, I also left quite overwhelmed. I know I should focus on the important stuff (me and babies are healthy) but instead I focus on all the changes that potentially coming my way. For instance:

• dr. asked me about my regular routine. I told her each day I take Addie some where in the morning, like a park or museum. I rest for about an hr during her nap, but once she's awake I then clean or cook or do other chores. Dr said at this point in the pregnancy, I should be spending 6 hrs a day sitting. Um... what??? I can't do that! What about Addie? What about the house? What about poor Mike who works all day??? I can't ask him to then come home and cook or clean or bathe Addie.
• Oh, but the best part was yet to come. Dr. said by week 24 (and possibly earlier) I will need to be off my feet ALL THE TIME. Again - how is that possible???

I told the dr we are thinking of moving in the next month. She said that's fine as long as it's before I'm at week 24. She also recommended that we think of putting Addie in a daycare or preschool since I could potentially be useless in 6 weeks - not to mention, what I'll be like once the babies are born.

So here's my panicked thoughts:

1. how do I feasibly stay off my feet 6 hrs a day? 

2. what things can I let others do for me without being a burden?

3. is it too late to find a preschool for Addie? and how would we afford one?

4. if we end up moving, how do I contribute given that I'm not supposed to lift anything heavier than a' basket of clothes?

Feel free to tell me to calm down, take a deep breath and relax.