Welcome back, it's a while since you have been here and I hope all has been well. As you mentioned before you have anxiety and OCD and are taking meds and up til the present all was ok.
Now the world has changed. It is a most worrying time, for everybody, but perhaps more for those with anxiety conditions.
My own symptoms have ramped up since COVID and isolation came along. I have at one time or another had all the symptoms you mention except the lymph node and had them tested in hospital as they occurred -and again later on. All physical symptoms of my anxiety condition.
It does not make me a hypochondriac, simply a prudent person who finds out what is going wrong.
You can be prudent too, but in your case for two reasons, the first obviously is to get that physical checkup, the lymph node in particular as you are worried over it, but also to see if your medication needs adjusting to compensate for the more stressful life you are now living. Meds are not always fixed for long periods without some adjustments from time to time. It's normal.
This is reasonable, and sensible. No doctor is going to think less of you for taking care of yourself and neither should anyone else.
I really would like it if you came back and said what you thought.