My dd is exactly the same, she didn't tolerate a baby carrier at that age either. Bad news is I am still struggling with naps with her at 8 months old. Good news is she loves being in the carrier now and will quite happily sit on my back whilst I get things done. She will even fall asleep on my back. She didn't really settle in the carrier until about 4 or 5 months when she could have her legs spread comfortably, she hated being froggy. At 8 months she also likes to explore the world around her and so isn't on me all day long. So it does get better. Hang in there. I struggled those first few months with her, especially as I had 2 small boys to look after as well.