Continuos headache. Me i shall be very!

I am a student of 12 class and i have too much headache,i am facing this problem for 3,4 months and the head pain is in half head mostly it is backward or near the ears .Because of this headache i didn't eat anything because it feels like when i will eat then i will vomit all the food on the spot and i didn't use too much phone or watch too much television and my eyes are also fine as i can see both far and near objects and can read both near and far things .I don't know ehy this is happening and another problem i have is overthinking ,i overthink continuously and when i start thinking and taking too much pressure and tension,it feels like my head will burst out . My family members didn't take my problems seriously and they don't have enough time to go to a good doctor so i am sharing with you doctor Please help me i shall be very thankful to you for this