amitripyline,lexapro 20mg and clonazepam 5mg

I have been taking clonazepam for three years now, started on laexapro 20mg, two weeks ago. was taking triazalom for sleeping but had to stop hadn't slept in three weeks, now I have been given amitripyline 25mg, slept last night in the first time in over three weeks, have been depressed and crying cause of a family matter, but when the doctor upped my dosage to 20 mg of lexapro, it has helped, the sleeping no. But as of last night with the amitriptline I did sleep. Is this meds. all ok to take together. As fae as the clonazepam goes, I have anxiety attacks, so i only take that when I have an attack, it isn't every day. Thank you Cindy