She has been teething since 4 months of age but still no teeth. She has had really swollen gums for the last few days, so I wouldn't be surprised if there are teeth soon.
In reply to the message about anyone putting their baby in a walker, yes I did. We put our daughter in a walker at the age of 3 months. Before this she was always wanting to sit up, hated lying down, either on her back or her stomach. We bought the walker just to get a break from always holding on to her. She loved it, and still does. We got into a routine where she sits in it while Mum & Dad eat their meals. Now that she is on solids, we also use it to sit her in while we feed her (until we get a high chair).