5 month old tantrums

I just want to know if this is normal and how to deal with it as i’m losing the will to live 😬

I swear the terrible 2’s have started a year and a half early with my 5 month old. I cant seem to make her happy at all anymore. Shes throwing proper tantrums at every single thing, throwing herself backwards, kicking her legs, screaming, hitting me in the face, hitting herself in the face, rolling around and literally acting like a tantruming toddler. i didnt think babies could even act like this. Shes kicking off and not napping or sleeping well anymore either. I’m exhausted and just don’t know how to deal with it. She seems to only be happy if i’m walking around with her holding her.. but i cant do that 24/7! if i try and put her down to play or do anything she used to love, she’s happy for about 20 seconds then gets so angry at everything!! Send help lol

(just wanted to add, im not actually ever losing my shit with her, im a very positive and patient person on the outside and never lose my cool and give lots of cuddles and happiness etc at all times for her when shes like this … but inside im dyinggg and ive never been a smoker or drinker but god damn im tempted to start looooool)