Took Antibiotics For Mouth Infection After Root Canal Which Lead To Oral Thrush And Vaginal Yeast Infection. How To Cure?

I have an infection in my mouth on a tooth that had a root canal done years ago. I went to the dentist and she cut the knot open and then put me on antibiotics called clindamycini took 40 total 8 per day. The day I take the last pill the antibiotic gave me oral thrush and a vaginal yeast infection. also abdominal bloatin, constipation, fatigue ,disorientation, back pains and my stomach is aching but it could possibly be from the constipation. All of a sudden days later after I finish the antibiotics and get all these symptoms the knot the dentist had cut and it went down just popped back up. So is the infection not going away because the antibiotics are giving me all this trouble? Becaude the infection in my mouth basically opped up over night and had my face swollen so I feel as if there is a deeper issue. Please help.