C-Section Moms: getting to an appointment when carseat is too heavy?

Hey C-section moms!

I have a lactation appointment in a couple of days but my husband will be back at work. We have a Doona carseat/stroller, 16.5 lbs, and my baby is 9 lbs... how do I get everything in and out of the car without breaking the no lifting more than 10lbs rule?

I'm 3 weeks pp and don't have anyone who can go with me.

Thank you!