Am i taking too much Ibuprofen?

I am 175 pounds. About 6 ft tall. Ive had a really bad sore throat, possibly strep so ive been taking 3-4 200 milligrams at a time about 3 times a day now for the past 2 days. This morning around 11 i had 4 because it was really bad. I took 3 at around 6 and then now again at 12:45am. Should i be worried about anything or am I just fine? Ive been eating before and drinking a lot of OJ to help it in my stomach.