Hi I wonder if anyone can help?

Im 16 and have been on anti depressants since the age 9, this is because I suffer from severe emetophobia, which in turn causes really bad panic attacks and has also caused eating problem.
From as far back as I can remember I have lived my life in constant fear of getting sick.
I have been forced to grow up very quickly in order to understand what is wrong with me and to try to find ways of dealing with it.
From around 9 years old I was on seroxat this lasted for over 5 years, until the doctor finally realised it probably wasn’t good to have such a young child on it for such a long time (this was only weeks before it was banned for under 18’s).
After coming of seroxat my life was unbearable so I started on prozac this changed my life I was able to go back to school and sit my exams and start college.
I have now been off prozac for around a year and have been great up until now; I have been under some stress with exams and interviews and can feel myself slipping back the way. So I have decided to start back on prozac for a bit, but my one big worry is the side effects !!!! I have never suffered any side effects from either seroxat or prozac in the past, but am terrified I will when I go back on !!! Has anyone out there suffered side effects for the first time when going back on prozac ????
Please help !!!!!!!!