Swollen nodes in groin, neck, and under arms

[TLeigh71]

I have been having a lot of pain down my rt leg for about the last 2 weeks.  Had a hip MRI, it was fine....I DO have some bulging discs in my back with some nerve impingement.....but I have never had pain in my groin that goes down the front of my leg, into my knee. So, had a doppler this last week.  No clots, but the lymph nodes in my groin are extremely large.  I was put on Doxycycline, for 5 days now, 2 times daily. Still no change.  Just very frustrated.  This is NOT in my head. I don't like going to the doctor as it is, I am not a great patient. I've done radiology for the last 20+ years, and am used to being on the other side of the fence. My doctor said that we probably needed to do a biopsy on my lymph nodes. Just wondering if you think this is truly necessary.  Both of my legs are swelling, with no change.  I am constantly either freezing or hot......also irritating.  Just wanted to know if biopsy is really necessary?  Also, have swollen nodes in my groin, under my arms, and in my neck.