New medication making me feel terrible

So yesterday my mom took me for allergy testing (it was just an evaluation). I have a Septoplasty scheduled in two weeks for my deviated septum and constant post nasal drip, but my mom insisted I get tested for allergies as well. While I was there, they had me do a breathing test which revealed an obstruction in my airway. Because of this, they put me on Trellegy for two weeks.

Last night, it made me feel absolutely awful. I was coughing constantly (not my usual cough from post nasal drip, a dry, hacking cough), and my heart rate was all over the place. I also had a small fever and was very uncomfortable. Today I felt better, but I have been feeling a little off since I took the Trellegy. My temperature is a little bit higher (low grade but similar to yesterday), and I am still coughing and hot. I’ve tried to tell my mom, but she insists that it’s just because I’ve just started taking it and that I’ll be fine. She says I HAVE to keep taking it, no matter what, but my concern is that if I do get sick, I can’t get the septoplasty. I have an appointment tomorrow for my actual allergy testing and I’m going to bring it up to my doctor.

As of right now, I’m sitting in my dad’s car, angry and uncomfortable. Prior to this, I had an argument with my dad as I was having a hard day (because I’m uncomfortable), but I’m not telling him because it will only make things worse. I also missed class unintentionally today because I overslept as I was up most of the night uncomfortable and melting down. I was born premature so my lungs may just have a problem (they collapsed several times when I was in the NICU). I am seeing a pulmonary doctor at the request of my mom, but I’m terrified about what this medication is going to do to me, especially since I was told that some side effects are bronchitis and pneumonia.

Has anyone else had a similar experience to me with Trellegy?