Initially I went to the ER with a headache, it was there for about 2 weeks... they kept telling me it was tension and finally did a scan. Brian/head normal but did show I had major sinus blockage. Went to see specialist and they gave me a nasal spray. Took nasal spray for about 20 days and still wasn't feeling better. Went back to my primary care who gave me AMOXIL 875 I took it once yesterday and it shot up my heart rate. Took it again today and I had the same feeling this time with chest pain and went to the ER. I should stop taking this correct? ER found nothing on EKG or lung scan. Told me I was dehydrated and having panic attack.