How did my sweet LO

Get an attitude?? Omg. I swear. When he gets mad, he throws himself back and acts like the world is ending. This happens when I am putting his jacket on (which he hates and understand my so I hate winter because of all the gear.) and when I take something he isn’t to suppose to have away from him. (Example: an adult fork that he will clearly hurt himself, or yesterday when I bought an IKEA toy for him and was assembling it, and he was “helping”) he has also learned that if he holds onto his medicine in his mouth after I give it to him, he can spit it out. ugh. I just am not ready for these tantrums.