Both of my sons tested positive for strep. i've had my tonsils out, but have felt poorly the last 2-3 days: nausea, aches. is it likely to be strep?

It could be, if you : also have a fever. Get a Quick-strep done; if it's negative, wait for throat culture results before startling antibiotics. If you have a viral flu-like illness, antibiotics will not help. Your sons need to take their full 10-day courses of antibiotics to prevent Rheumatic Fever, a complication of pharyngitis caused by certain strains of Group A Streptococcus.