generalized anxiety disorder

I have been suffering from GAD for 1 year and more but was not under any medication but now it went worse so doc prescribed me 10mg propranolol 2 times daily and clonazepam 0.5mg in night 

For 15 days 

Since I have exams for 3, months I'm already stressed out 

and doc told to continue it till exam finishes 

But I stopped after 15days coz I got scared of addiction but he said it won't happen but I was scared

And then after 7 days stoppage of clonazepam (I'm still on propranolol)

I feel anxious again n insomnia 

Feeling hard to study 

So I'm thinking of taking the med but I don't need it everyday 

Coz if I take one day I'm okay for 3 days 

So how many days I can use it without causing problems to body 

Is it okay to use it consistently for 3 months as doc said ?

Please some one clear me out 

This is making my anxiety worse 

I hope u guys can understand 

I'm getting closer to my exams too and suffering also 

Please help me out 

Hi Rachel you will be alright if you keep it at a low dose and not on a daily basis.After your exams are over ask your doctor to refer you for therapy.Good luck with your exams.

So how many days in a week I can take ?? 

2 or 3 a. week and stop after your exams.