Has anyone had extreme fatigue while on Prolia injections or after?

Within the first few days of the first injection of Prolia I began to have fatigue so strong I had to stop whatever I was doing and rest, a deep rest, sleep and wiuld wake up a half hr or more later. Sometimes I would need longer rest. Still have the periodic fatigue where I feel asleep seated or laid down. Some says there are more than one episode. I dont drive when so tired. Feels as if my last breath. Nothing seems to trigger it. Does anyone else have this? My life is totally unproductive then. Is this another autoimmune issue? What can I do? Suggestions? I dont feel restored after rest. Thanks.