Why do I have to go pee every 30 minutes and when I do I only pee a little bit? It doesn't burn. Oh & I don't eat/drink healthy and rarely drink water.

You may have UTI. Even if you do not have pain or burning you may have urinary tract infection and need to get cheched including urine exam including culture meanwhile drink lot of fluids.As a rule you should drink more fluid daily.Weigh yourself in lbs and multiply by 2/3.That is the number of ozes of total fluid you should drink daily most of it water. For example if you weigh 150lbsx2/3 is 100.So 100oz(3litres).