Random sleep issues

Lexi • Kolton Michael 10•3•18 💙👶🏻

So my son is 7 months old he has been sleeping 9-9 without waking up from about 4 months old. Now I’d say prolly for the last 2-3 weeks he has been waking up every hour on the hour wanting to be rocked back to sleep or held for a few minutes and laid back back I’ve tried letting him cry nothing has worked he just ends up rolling around in his bed and starts playing. Idk what to do but it’s getting pretty old. He wakes up from his last nap at 5 so I know it’s not him sleeping too much before his actual bedtime. Any suggestions on anything that could help?? Is it his age like could he be going through something right now.