Am on med at 5 mg currently. Would like to take half in am and the other half at bedtime. Last few nites I have consistently woke up at 3 am right on the dot and cannot g back to sleep. Is it because iam splitting the dose. It has not helped me sleep or made me sleepy since I have on it for the last month. Cant decide if waking up when I do is from taking it at nite or in am... anyone tried this?.