I've had the suspicion for over a week, so asked DP to pick up some teething gel.
DS is normally such a chilled baby, in fact, I hadn't heard a 'proper' cry from him until Tuesday, when he received his first inoculations and he screamed. He hasn't really stopped since.
I'm sure I can see his tooth buds and although he's been grumpy since Tuesday, I tried the teething gel about 20 mins ago after he woke up, suddenly, screaming.
As soon as I rubbed the gel on his bottom gum, he fell
straight back to sleep.
It seems like maybe I've answered my own question but he's only 9 weeks old (as I previously mentioned
)