Hi, I Was Given Some Samples Of Belsomra To Take

Hi, I was given some samples of Belsomra to take instead of Ambien, which is now a controlled substance. I then found out that a month's worth of Belsomra would cost me about $120, so I'm going to go back on Ambien. Is going from taking one to taking the other the next night going to be bad as far as the centers of the brain affected by each drug?