Welcome to HCM.
If the swelling of nodes have reduced then you do not have to worry.If the nodes still persist after therapy, have become hard, tender, clumping together then you have to get in touch with your doctor for examination. I do not see any co-relation between your blood pressure and swollen lymph nodes
is common when recovering from illness. This is called convalescence. I suggest healthy diet, lots of fluid and positive attitude for good health. Thanks.