from your description of the symptoms you should get a pregnancy
test done to rule it out.
for the vaginal discharge
is cream yoghurt like then it is a fungal infection
you will require antifungal pessaries to insert.
for the part of feeling hungry, if pregnancy test is positive then it explains itself, if negative then you have to check your stool for worms and do a blood sugar test to rule out diabetes
hope to have answered your query