Can pericoronitis of upper teeth cause brain infection?

Hello doctor,

I have been diagnosed with pericoronitis on the upper left side molar tooth four weeks ago. I took Amoxicillin for one week and the inflammation went down in the gum area. During that time, I had pain in my gum area and that would radiate to my head sometimes. I heard that the headache can be a symptom. Does pericoronitis of upper tooth cause a brain infection? The reason for this question is that I am getting pain in my ears, eyes and sometimes around the head. My doctor said that the prognosis for pericoronitis is very good when the wisdom tooth is taken out. I never heard a story of someone dying from a brain infection from upper tooth pericoronitis. My gum is not inflamed anymore, so I believe that the infection has resolved or under control. However, should I worry about pericoronitis? I heard that majority of people who got pericoronitis do not have any problem after the tooth extraction. Also, I popped a pimple on my right temple and it was bleeding a little bit. Can that cause a brain infection? I visited my doctor thrice for this. He told me not to worry and prescribed an antibiotic cream on it. Now, my pimple is healed up. What are the chances of either of these two things causing an infection or something in my brain?