It would help if you had mentioned your location. Some centres like Mississauga have probably had more influx of applications, and have been taking more time to process applications compared to other locations. Even within the same location- you'd have cases where somebody applied after you getting their application processed before you (could be their case was more straight forward, lesser travel, the case officer etc).
I would suggest you check out the citizenship applications tracker linked in one of the signatures above to compare where you stand with other applicants to get a better picture.
TLDR: There are many people like you waiting for a similar period, so no reason to worry.
