Soreness 3 month after masseter Botox

I got masseter botox in my jaw 3 month ago, I had TMJ and also a very wide jaw which really bothered me. I was very happy with the results until 3 days ago I started to feel some kind of soreness in my left jaw. I feel like its a bit swollen as well. I only can go back to my doctor in August.. Can you please help me what can cause the soreness? Thank you