Feeding and reflux cycle

My LO is 4 weeks old and I breastfeed her. When she is awake she constantly wants to feed. After almost every feed she spits up (sometimes a little and sometimes ALOT). She will have reflux then try to feed straight away after. She will even try to feed and then reflux again before getting back on the boob. Surely she can’t be hungry if she still has milk in her belly! Anyone else had this? Any advice? I mentioned it to the midwife around day 10 and she said that as LO had refluxed she was hungry again & the reflux was common and not a concern if she was putting on weight. I am not sure I believe this anymore. Going to call the GP tomorrow.