32 yo/F. I get strep throat 3-4 x's/yr. My tonsils get grotesquely swollen and completely covered in pus. Is this dangerous/bad for my heart?

Heart and Tonsils. Bad for heart only if it is strep and develops into Rheumatic Fever and attacks the heart valve. Even at that. Pustular documented strep tonsillitis 3 to 4 times a year, I would see about getting my tonsils out. Not fun at your age, but you will be glad you did.