PLEASE HELP Baby cries anytime she is in a stroller or car seat

Hey all,

Please help me with some advice. My daughter is 7 months old. Hasn’t been able to sit on her own yet. Every time we put her in a stroller or car seat she cries uncontrollably. We tried everything - cushion, toys etc. she is also well fed before walks. She was doing totally fine with strollers on 1 hour walks up until 2 weeks ago. Not sure what’s up with her the last 2 weeks. She is basically fine to be in her crib all day, but not strollers or car seats.