You could try talking to a pharmacist. They are very up-to-date on medications, possible side effects, etc. But, my husband, the pharmacist, says they could only speculate what might be happening. However, a doctor is going to want to see you to truly determine if it is a reaction. Not all drug reactions are "by the book." When we called our doctor's office about a possible allergic reaction our daughter was having, we were told to go to the ER right away.
Personally, I would talk to a doctor or a pharmacist over a nurse. The nurses can only ask what your symptoms are and pass that information along to the doctor. When I call our nurses' line they ask me a long list of questions that are on a flow chart and then tell me either to make an appointment to see the doctor, go to the ER right away, or not to worry about it. The last time I called to talk to a nurse about a slightly concerning symptom I was having, she told me I should call someone to watch my kids and call an ambulance ASAP. It was a total over reaction on her part. She took for face value what I told her, but didn't know my history. I went in to the doctor that afternoon and they found nothing that needed immediate attention. The majority of nurses are excellent at what they do, but, their medical training is not the same as a doctor's. Plus, more and more doctors are not giving medical advice over the phone without seeing patients because they want to cover their own backsides. How you describe your symptoms on the phone may be different than what the doctor actually can see.
I know paying again for what seems a simple question seems like a waste of money, but unfortunately that might be the only way (and the safest way) to get the right answer.