I had a tampon in my vagina for almost 3 weeks without knowing it until I started to develop a foul smell during sex and bleeding. I was feeling a little woozy so I went to my gyno and he removed it. He prescribed me metronidazole. I ve taken it now for 5 days. I m having horrible side effects like headache, eye pain, nausea, very lethargic, itching and feels like I m getting poked with pins and needles. Is it ok for me to stop taking it now? The side effects are awful and killing me at work.