Projectile vomiting

I have a 4 week old baby and I had never seen her vomit before this. Last night after a feed she projectile vomited everything we had just given her, like this episode went a few inches into the air kinda deal. She’s never done that before, she spits up but nothing like this. Well I thought it must’ve been a one time thing so last night we went to bed as usual. Well some time after a feed I noticed it smelled like vomit again and I look over and her bassinet sheet is soaked, so I assume it happened again. I thought to myself after reading some subreddits that okay it happened twice but if it happens a third time maybe I should be worried… anyways I woke up this morning with her and there are marks on her sheet as if it had happened again, I didn’t notice a smell but ya start to not notice things as time goes on in the night ya know… but I did notice it now… so I assume it happened a third time. She has a doctors appointment on the 12th but should I get her seen sooner?? Should I wait and see if it was spit up vs vomiting last night? I hadn’t seen what actually caused the marks on her sheet so I don’t know for certain, should I wait and see if it happens again? Or should I have her seen asap? Not sure what to do or think and google made me scared she randomly developed pyloric stenosis🫠🫠