Worried about behavior..

I don't know if this is all normal baby behavior but I'm really struggling. I see some characteristics in my baby that worry me. He gets angry, frustrated, whines, kicks at things, hits etc when he's over tired or unable to do something (like crawl or sit up). Is this normal baby behavior? It's like he's already throwing tantrums and he's not even 7 months!! I'm really starting to feel frustrated with him and today I just cried.. getting him ready for bed was a serious battle.