I began taking buspirone about 4 days ago. Taking 10mg morning and night. I struggle with anxiety. I do feel like my anxiety has been better, but I cannot get more than 5-4 hours of sleep at night. I also noticed my heart rate has been lower most of the time, which is fine. But last night while I was relaxing my heart rate sped way up and I felt like my heart was beating irregularly! It really freaked me out! Is the insomnia and weird heart beating a side effect that will go away? I would be disappointing if they would not... as I do fee like this medication is helping my anxiety.