I feel like crud

I'm 15 wks pregnant with our third baby. Our older children are 12 and 9. My 12 year old has some type of stomach bug and has thrown up around 3 am for two nights. Praying nobody else catches it. The week before my younger son has had a cold and needed inhaler throughout the night. Wondering if I feel so cruddy, tired because i haven't been getting good sleep. My husband has been a help but he works and I don't  so hard for him to wake up in the night. You think my run down super drained lack of appetite feeling is because lack of sleep or pregnant symptoms or both? Nobody has had a fever