4 week symptoms

Hi all, I’m 4 weeks exactly today and I haven’t been able to keep anything besides milk down since Thursday, have heartburn, super gassy, crampy and crying over absolutely nothing. I feel like I’m losing my mind already lol but I thought 4 weeks was a little early to be having such strong symptoms? Is this normal? Please let me know your experience this is my first pregnancy so totally new to this. Also if you have any tips for any of the above symptoms please let me know!! Thank you 😊