Vomitting after i eat/drink

Hi Mummies, can i ask for opinion/suggestions from those who have experienced like me before.. I’ve been vomitting since yesterday, whatever i eat or drink, i will vomit everything out.. But i ate porridge for dinner last night and didn’t vomit. Today, after i had my breakfast and lunch i vomitted out everything too. This is the first time that this is happening. What should i do? Should i still monitor or walk in to GP or to the hospital?