Birth control pills side effects.

I had a pill of unwanted 72 on Sunday after having sex on Saturday within 24 hours as the condom gave away. On Tuesday when I woke up in the morning, I had light swelling on my upper lip with a lot of small dots on it.. I went to the doctor and on being asked if I had any kind of recent medication I said no as no one in my home knows. He adviced me to use soframycine and gave me vitamin b-capsules. I have been having this every year once or twice since the past 4-5 years which I treat by home remedies. On Wednesday wen I woke up the swelling had increased to twice its size and I stopped application of the ointment as the doctor had advised to because I might be having allergy from it. I am concerned as is it because of the birth control pill I took??? Or is it because of some allergy or infection or really b-capsules deficiency???