Please help!

B

Went to the doctor today for my 5 week old and we had to switch formula because she keeps spitting up and puking. We started enfamil AR. The nipples I have for her are too small for the thicker formula so I tried a different nipple I found and it’s too fast. She is clearly hungry what do I do? It’s 3 am where I am I can’t just run to the store. She keeps spitting up and puking every 20 mins idk what to do