Harsh lesson symptoms and conditions

I first started to take Flowmax about three years ago and took it for about a year. I had most of the symptoms mentioned but also had swelling of one of my lymph nodes in the neck, also a nodule appeared next to one of my testicles (which I presume was another lymph node as it has now disappeared) , severe sore throat which had me off work for nearly a month. Together with all the other symptoms I thought I was on my way out! - Then I had reason to go away for a long weekend and forgot to take the Flowmax with me and most of the Symptoms disappeared!! It was only at this stage that I actually looked at the side affects of the drug on the packaging did I realize what I had put myself through. Never again will I take for granted that medicine "will do me good" I harsh lesson. My neck gland is still the size of a golf ball, and now through ultrasound they have found nodules in my thyroid gland. Is this all part of the same thing I ask myself? (ps I did not get the painful erection which was more or less the only one I did not get)