My 15 month old son will not sit in a pushchair , car seat , high chair or shopping trolley !!! I've tried everything , tightest settings you name it . He just screams and wriggles himself out and stands up . Shopping is completely impossible . He can't walk yet either . And when I do carry him he kicks off to go on the floor . I feel trapped in the house all day long because even walking to the shop is a headache . He's always been like this just getting worse . Not sure what I can do ??? He's too heavy in a sling/Carrier for me too and I can't carry him and a nappy bag everywhere .