My 6 month old son has had a nasty cough for a few days. Over the last couple days he has started breathing really quickly. Yeserday he started sucking in his breathing and his neck. He seemed happy in him self. This combined with waking up with blue feet and having a very long nap I was worried and took him to a&e. We aired ages (they did his observations once oxygen heart rate fine was breathing fast) once. They said he probably had a mild cold. This morning he's just had a three hour nap I've had to wake him up from. He's still breathing really fast and sucking in his tummy. I don't know if I should take him back or ring gp. He's my first! I have autism and struggle with hospital/ doctors. Don't know if I'm overreacting. Don't want to be that parent. Any advice ?