I am 43 and experiencing palpitations especially when i lay down. they wake me out of sleep. i have anxiety and take prozac (fluoxetine) for that but it isn't help?

Common problem: Palpitations can be a sign of all different types of heart arrhythmias. The greater majority are safe & are common to most people at one point or another. There are some palpitations that are more frequent with body position, at night, or during the onset/offset of some medications/foods, but people also tend to notice them more when they go to bed. See your PCP for evaluation & possible test.