Nausea and fear of puking

Hi! I’m estimated 4 weeks preggers (I likely conceived via IUI, which is why I found out earlier that I’m preggers). I’m feeling really queasy and lost appetite on most days. Also lightheaded, almost like gonna faint feeling, and dizzy when I scroll my phone too fast. Any of you experience such symptoms? I also have a severe phobia of vomiting, does anyone know if gynaecologists can prescribe medicine for me to standby in case the nausea gets worse over the upcoming weeks? Im guessing it may get worse. #firsttimemom #pleasehelp