Sleeplessness. Medicines. please advise.

I had been diagnosed with depression as a cause of my sleeplessness about three years back and was prescribed Escitalopram oxalate 10 mg( Feliz -s 10) one tablet daily. However, I forget to take them once or twice in a week. I have moved from my city where I had consulted my psychiatrist and since I had no access to him I was afraid that discontinuimg them would cause problems. My problems of sleepless ness however now seem to be corrected. I have another problems which are not associated to this, like smoking( which I'm trying to quit) and mild mitral valve prolapse with trivial mitral regurgitation. I would appreciate if someone advises me how to take this forward, as in should I consult a new psychiatrist, or should I discontinue them on my own. I have heard that yoga can help in this respect, so should I adopt a yoga routine and give up on such medicines. Please advise. Thanks