PlEASE HELp!!! STD's & Pregnancy! Honesty PlEase!!

Where can I purchase a cheap ovulation test? How much do they cost? And for the ladies who have tried it, does it work? How many months do you try to concieve before you use one? And I know people don't want to admit to STD's but has anyone had problems ttc because of their lying ass!! Or can you have herpes and still get Prego? Please be honest with me