Sickness that drastically varies🤢

Does anyone else have sickness that some days is almost non-existant, other days is HORRIBLE?? I am currently 12 weeks and have been this way since about 8-9 weeks. Yesterday i felt great- ate whatever i wanted, only had a couple times when i even felt queasy. Today, i woke up and went straight into throwing up. On the bad days, i might throw up anywhere from 3-8 times. Has anyone had a similar experience and been prescribed something to take just on the bad days? I don't want to take anything daily because i don't really need it every day.