Hi there and welcome. I'm sorry to hear this! And no, it doesn't sound strange. I think most who suffer anxiety and depression could say they have noisy thoughts they have difficult time turning off. Do you see a therapist or have any treatment started?
I still struggle with the loss of my wife of many years, yes I also have to deal with being old. The saying "growing old ain't for sissies" hit it on the head.
Anyway, I know mental rumination can be very difficult to deal with. I have the most difficulty when I wake up after an hour or so of going to bed and remember an upsetting dream.. the rumination always slips to loss of wife and self incrimination that I didn't make more of the life we had. That sort of thing. I often turn on the light, look at my (tablet) computer and then just lay there with the light on. I usually drift of to sleep again only to repeat the process again. I have been taking Trazadone hope was for less depression/sleep interaction and maybe some relief during the day from depression. I was prescribed one 50 mg a day, taken at night. The med has a short half life, and is mostly gone before the 8 hours sleep period is over. I shifted to taking during the daytime and using ambien (generic) and had a slight improvement in sleeping, but still trouble staying asleep, and still dream cycles.
Understand we all have, must have, periods of REM sleep, which is when the dreaming usually/always (?) takes place. Happily most of us don't wake up between REM and when we do wake up we don't remember dreaming, so dream content can't spoil your day.
I had my annual physical yesterday and my primary care shifted me to Zoloft (generic).. any input on that drug and my troubles sought. Tx.
I understand what you are dealing with. It is not strange at all!