Hello dear I understand your concern Frequent urination could be due to the UTI or anxiety Sex during the period may increase the chance of infection. Diarrhea could be due to viral gastroenteritis. Both are not definitive symptoms of the pregnancy. It is very difficult to say about pregnancy at this time. You have to think about pregnancy when period will delay by 7-8 days from normal expected period date. I would suggest to undergo urine tests to confirm the infection. If report will positive then antibiotic require for antibiotic. Meanwhile drink plenty of water and fruit juice of cranberry, orabhe and pine apple. Avoid stress, maintain proper pelvic hygiene by V vaginal plus wash Take healthy diet. If diarrhea will remain more than 48 hours, then go for stool tests Eat diet like banana, boiled rice with added lime juice and salt, toast. Avoid spicy/fatty oily food. Contact HCN for further query Best regards Dr. Sagar