This is normal. Use journal where you will record what stuff you consumed and also....mandatory how much water etc. Get ( if already don't have weights and fix weight on daily basis : ag least morning after woke up and evening before rest...like this. This might provide a bit form initial info to think about. Ofc there is stuff like nutritionist ( dietician ) and I don't mean here self proclaimed " specialists .". Some from really good sport nutritionists does have M.D level education and specialisation in medicine and certain certs + additional education and other stuff for sport science.
If you are concerned about possible glucose letc levels problem only alone valid test is bloodwork session before, after and a bit longer time after physical workload. It is stuff like doctors are using.
While under heavy physical workload you might feel tired and hungry even if you had consumed 3x more calories etc than some office worker and there maybe is nothing wrong....
