Have diarrhea past 2 days,had blood twice ,fever of 100 .i have slight pain when i have to do diarrhea.vomit just once.food posison perhaps?i did take clindamycin for teeth and finish it in 2 weeks ago,maybe after affect?

Fever and bloody diarrhea are symptoms of an inflammatory colitis. Infectious etiology is possible especially you traveled recently. Inflammatory bowel disease such as ulcerative colitis or Crohn disease needs to be ruled out if symptoms persist. Late side effect of Clindamycin is less likely but still possible. You should see your doctor if symptoms persist past this week or worsen. Take care.

you need an colonoscopy

Probably not food poisoning or affect of antibiotic. Please see Dentist for tooth/gum issues. Antibiotic will control, not cure. Oral disease control required. As to your GI symptoms, please promptly see Endocrinologist.