Not testing too soon..

I got a positive ovulation test Monday October 19th. It was negative the 18th and the 20th. We did it every other day the week prior and then we did it on my O day and the following day.  Tomorrow will be 7 days after ovulation.  I have been have small cramps every other day for a few days.  I tested today, probably just because I had a test to use but it was negative. I wish I didn't test because now I am feeling defeated.  When should I test again? My period is due around November 1st. One week away.  With my first I got a positive 7 dpo, but I know every pregnancy can be different.