No, it is not a clot.Praying, @amadeus .... could if be a clot? Idk if you're vaxed, but clots are a concern with certain vaccines.
He mentioned some other possibilities. My mind does not process things fast enough to have understood and to remember them all now.
My wife's memory is better on such things, and our daughter, an RN, was there as well. The two of them seemed relieved so I am relieved as well even though it is not over yet. Hey, for that matter it is not over until God says it is.
Thanks for your concern and prayers.