Twin pregnancy with toddler at home

Hi all, I'm a stay at home mom. I'm 17 weeks with mono-di twins and have an 18 month old at home. Most days I'm okay but today I'm having lots of stomach issues, am dizzy, and nauseous. My little one has been watching a movie all morning and things like changing a diaper and stuff are super hard for me to do. I'm getting concerned that I physically can't handle the pregnancy on my own all day while taking care of him, as I still have a ways to go! Do/did any of you SAHM have help at home during the day with other kids? Any suggestions how to handle it? I feel silly even thinking about hiring somebody to help and we don't really have the money for it, but we are hours and hours from any family.