I had been diagnosed with anxiety and OCD symptoms. Doctor had put me on Depsert 50 mg for a month and later on sertraline 100 mg. I took the tablets for 8 months and stopped one day without consulting my doctor. I was fine for year after that but now I am finding the symptoms again want to start back with medicine I have old prescription which my psychiatrist had given. I don't know why the symptoms have started again. Can I start taking my earlier medication once again.