Do i have anxiety? Should i go through with seeing a psychologist or am i just a normal teenager?

i'm 16 years old and for the past 3 years have often felt anxious about small, stupid things. But in the last 6 months it's started to get a lot worse and a lot more frequent. At first i thought it's just what all teenagers go through, and that i would be fine in time but i'm beginning to get worried. I'll wake up in the middle of the night with a nervous, queasy feeling in my stomache and start to worry about all the things that happened that day and all the things that could happen the next day. Then, all through the day, i'll continuously start to feel anxious again, and i almost always have a headache and feel shaky. i also often get hot/cold flushes (don't know if that's related???). i finally worked up the courage to tell my parents when i got scared out of my mind one night when i was home alone over nothing. i was so paranoid i just sat in a corner and cried. So my mum (who is a gastroenterologist) booked me in to see a psychologist, but now i am worrying about that.