Boniva IV Side Effects

I was recently diagnosed with Osteoporosis.  My Dr. recommended Boniva IV because I cannot take the meds by mouth, due to Acid Reflux Disease.  Had my first injection yesterday.  Ten minutes later, as I was running errands, I suddenly experienced difficulty swallowing.  I drank some water, managed to swallow with great effort, and it got better.  I seemed to be alright again.  As I was driving home, I suddenly developed numbness on the left side of the head, from the throat to the left nostril, and the top of the left side of the head.  I also felt a slight swelling inside the left side of the throat.  Wondering if this would spread over to the right side, enveloping my entire head with numbness, I decided to pull off the road and park in a nearby shopping center.  I just sat in my car for about 10 minutes, then got out and walked for a bit, and got a cup of coffee.  The numbness subsided and I felt more normal again.  I was able to continue the drive to my home.  Today, I am experiencing upper back pain and joint pain, which appears to move around different joints.  I am feeling a bit "draggy" today and have been resting most of the day.  After reading many of the comments on this site today I am reluctant to go for the 2nd injection in May.  Has anyone experienced the side effects I described?