I can't seem to find the form of this word. Most likely it's a commonly used form.

[Razahia]

Maybe I'm just not good at looking for it. But 騒いでいた I can't seem to figure out the form for this. or maybe it's two words or something? unsure.

 

[Mike Cash]

Maybe I'm just not good at looking for it. But 騒いでいた. I can't seem to figure out the form for this. or maybe it's two words or something? unsure.

騒ぐ (さわぐ)

Have you learned basic verb conjugation yet? Especially the 〜て form?

The 〜いで is a dead giveaway that it conjugates from 〜ぐ, as no other sound conjugates that way. The いた indicates past progressive.