I'm seriously losing my mind

This has been a crazy week. My 2 yr old got sick with a nasty cold Friday and is just now feeling normal. And he kindly passed it on to the baby and I. Luckily the baby didn't get hit hard, just a little stuffed up, but I've been miserable. We went to my husband's niece's baby blessing Sunday and it was fun. And then Sunday night my grandmother passed away. I found out Monday morning from my brother. So Tuesday night we drove to my family's house and spent the night, the funeral was Wednesday morning. The service was nice, a short graveside service. I was volunteered for the closing prayer and barely got through it cuz I was crying. I wasn't close to my grandma because she had some mental problems and wasn't always the nicest person, but she'd still been part of my life since I was born. We spent the day with the family and drove home that night. I hate travelling far. It's almost a 3 hr drive and I have to be squished up in the passenger seat to make room for the baby's carseat behind me, so I was uncomfortable plus my husband likes to have the a/c going even if I'm freezing cold. So I was cold, tired, sick and squished for 3 hrs, with baby crying the last 1/2hr. Not fun. I just really need to sleep for a week or so. Baby's sleeping hasn't gotten any better, he still wakes up a billion times a night. The lack of sleep is really wearing on me. I'm cranky all the time and have no energy to do anything. My mind is starting to slip away from me.