If anyone uses OPT's....do you know if you should get a + WHEN you're ovulating??? I got a + yesterday and one again today...My understanding was that you get a + and then ovulate within the next 24-48 hours??? Just didn't know if they were + when ovulation is happening??? I couldn't find mention of it in the instruction packet and this is the 1st time that I've gotten a + 2 days in a row!