8 weeks and lots of vomiting

I'm about 8 weeks and I cant keep any thing down, I'm so hungry but when I eat it just comes up. I'm supposed to have my first doctors appointment next week but is there anything I can do in the meantime for all the vomiting? Also I've been stuffed up for like 2 weeks and all the phlegm is adding to the vomiting. ☹️ any suggestions? Thanks in advance.