Two days after the carseat adventure, we tried to put you in your stroller for a walk in the neighbourhood. You started crying outloud. You were even crying when you saw your stroller.
It took almost half an hour to help you feel comfortable, and even happy in your stroller. We put a couple of your favourite toys in the stroller, and let you just look at them until you got calmer. Then we sat you in the stroller to play with your toys. We, then changed the bassinet of your stroller to a new one in which you were more in a sitting position than a sleeping one. Then, i started singing to you and keeping direct eye contact with you, as we put you in your stroller. It worked, and the cries changed to sobbing, and then calmed down. I made sure you could see me all the times.
This morning you were fine when I took you in the car. But it seems that for the near future one of us needs to sit besides you in the carseat until you feel comfortable if you do not see anyone by your side.