second time mom and feeling guilty

Pregnant with #2 and have a 2 year old. The morning sickness is in full swing. Thank god I have the help to get me through and a wonderful husband that picks up the slack but how do I not feel guilty for spending an entire day in bed/on the couch? My little munchkin just wants to hang out with mama and I can barely move without wanting to toss my cookies. All I want to do is enjoy my daughter all I can while I'm still able to give her undivided attention.