My DD is 13 weeks old. For the last month she hasn't been comfortable in the Ergo infant insert - keeps straightening her legs so they slip down into the waist band. She's too big for the Baby Bjorn now (old model so kills our back!) but too small to go into sitting ergo position. Any advice on what I can do to make it comfortable for her/us, or do I just assume we can't use a sling with her for the next month or so (don't want to be buy a wrap just for a month or two as I will use the ergo all the time once she can sit)? Never had this problem with DS as didn't get the Ergo until he was 7mo.
Thanks (and Happy New Year!)