My first pregnancy I only got sick once or twice. I've been sick throughout with this one. These pregnancies have been like night and day!
I'll still have sex even though I don't feel like it to keep my husband happy, but the movement sets off my morning sickness. I usually have to lay down afterward to keep from throwing up.
I lost my sex drive last time too though, and after my daughter's birth it didn't return for months. I don't know if it was hormones or because I was breastfeeding or what.