Depression and anxiety symptoms often tend to overlap, especially in the older population, leading to an under-diagnosis of anxiety. However, treatment for the two disorders can be different - that's why it's important to accurately diagnose and assess these disorders in older adults.
I am 43 and I have suffered from depression and anxiety disorder for 28 years. Please go to your doctor if you have even the slightest symptom of depression. Finding a local support group to join if you can. Don't suffer alone.