Headache/Head Pains, Dizziness, Chest Pain and Muscle Pain

I am 16 years old, I am in school doing my A-Levels and back in september I woke up one day and I did not know what was wrong with me.. I felt absolutely destroyed. I was constipated and I was getting really bad muscle pains, chest pains and pains in the glands (mainly in neck and under the arms), I also had really bad fatigue and was having to sleep twice a day in order to live my everyday life with school and exams. I went to the doctors and they checked my thyroid and that was fine, then they said that I had glandular fever. Now after 3-4 weeks the worst of the symtoms had gone but up until this very day I still get the chest pain and some muscle pain. When I had this it got me very very worried because up to this point I had sailed through life health wise and I had never experienced something like this before. In other words (It scared the crap out of me).

I have recently been getting headaches and pains on the top and back of my head, it started with like a heartbeat sound mainly in my left ear and sometimes the right ear, then I got the heartbeat pounding sound in my head, I get it even if I walk up the stairs. Also I am still getting chest pain mainly to the left of my chest but sometimes I get it in the right of my chest, this sometimes comes with shorness of breath and when I get up from sitting/lying down my chest feels tight but then it goes away. I have also noticed that I have a very strong heartbeat and I can acually see my pulse because my stomach shakes and I can also see it in my neck if I look in the mirror. Along with these head pains I sometimes get dizziness, I feel off balance and that I could fall over any second. My eyes have also been playing up and I feel like I have eye strain. Now I get all the symtoms above through the day and I am very worried about it, with school and exams aswell it's quite a lot to deal with and I get quite stressed.

I am worried that this could be something serious and it goes through my mind all day. My Mum and Dad think it could be down to stress, that I still have glandular fever or that I could possibly need glasses. I don't think I need glasses because that wouldn't explain the chest or muscle pain. I am beginning to wonder whether It might have something to do with Anxiety/Depression because I have been worried about it for so long, or it may even be a sinus infection...

If anyone can relate to this or give me advice I would really appreciate it.. I plan on going to the doctor but they are usually a waste of time.. and there is nothing they can really do...

Thanks.