My 12 month old (almost 13 months) has suddenly started refusing naps. She goes down as normal but wakes up maybe 10-20 minutes after going down. I'm not doing anything differently. The only thing I can think of is it might be a reaction to the 12 month vaccine she had a week and a half ago? Or maybe separation anxiety? Has anyone else experienced this with their little ones? If so how did you overcome it? Thanks