My stomach always hurts after i eat and drink and i also get a headache

Try antacid/water: Make sure that you are drinking at least 2 liters of water daily. A mild dehydration is a common cause for headaches. Try an antacid for a few weeks taken 30 minutes before morning and evening meals and see if this helps. Avoid tobacco, alcohol and excessive caffeine. Consider adding a daily probiotic and a daily multivitamin to your daily routine.