@Sarah my little girl is the exact same. Also does this with the car seat but as soon as she feels the motion in the pram/ the car she falls asleep. I know it’s hard hearing them cry but after a few mins your little one might settle xx
My LO is exactly the same. I feed him, burp him and get him sleepy and drowsy and then put him in the pram and go for a walk to try and get him used to it. After a while it worked but we still only get about 45 minutes in the pram before he’s over it! Just invested in a good baby sling and have that on me as back up if he really won’t settle
My baby often cries when I put her in the pram but as soon as we get out the house and start walking she calms down and it sends her to sleep. It works every time unless she suddenly decides she's is hungry!! I know its hard but maybe try getting out the house and pushing the pram for a couple of mins to see if it calms them