I agree about the back carry! For me they were much more comfortable when my kids were older. You could also try getting a snugger fitting pouch. The New Native tends to be quite large, so not comfy for a hip carry. I loved doing hip carries for shorter trips with dd at that age. I had a Hotslings pouch and it was super for that. It can be helpful to try them on in person, since getting the sizing right is important.
Another thing, can you try loosening the straps a bit on the Ergo? Sometimes people (myself included) tend to make them too tight since they feel more secure that way. Letting them out a bit can make a big difference.
Kate LEUKEMIA SURVIVOR
ds1, A, 12.04
ds2, W, 12.06
dd, G, 10.08