Is this normal? I have stretch marks on my side by not the front

Yep. And some are just prone no matter how much lotion or butter they use.

Are you using any belly butters? I use cocoa butter lotion for pregnant women. Have not one stretch mark on my belly. I didn't apply it as religiously on my boobs so I have tiny stretch marks around my nipples

Yes I have them on my hips just your skin stretching.