Yeast infections are fairly common in women taking antibiotics. If you're not wanting to see a doctor, most yeast infections are treatable with OTC, non-prescription medications for yeast infections. They're the same as the prescription medications, but in lower concentrations. The downside is that you don't have a clinician confirming that it is a yeast infection. Usually thick, white, cottage-cheese like consistency with persistent itching. Nausea, vomiting, and diarrhea are also common with antibiotics. I'm not familiar with Lymecycline (are you outside of the United States?). Some tetracyclines can be taken with food (doxycycline), but others have decreased absorption (up to 50 percent with tetracycline). Check your medication label. If you can take it with a meal, you'll likely have less gastraintestinal complaints.