When do I start testing for O?

Hi, me and my DH have been ttc for 2 mths. now and we decided to buy Answers Ovulation Tracker that comes with 20 test strips. For the last 2 mths. I have had 33-34 day cycles. I used to have 30 day cycles, but I think stress lately has thrown my period off a little. My period normally lasts 4-5 days. My af started on Jan. 10th and I was wondering when I should start using the test strips. I don't want to start to soon, b/cuz I will run out of test strips the beginning of Feb. and I'm not sure when I ovulate. Should I start testing right after my period ends or should I wait?

[kcs08]

I would wait just a few days then start testing.  Make sure you date and keep all of them to compare.  When I first started I thought the lines were similar and I was ovulating when I wasn't.  Also, you can check your cm...go to fertilityfriend.com if you want to learn more about it and maybe about charting your temp.  This month I ovulated on day 22 but I had one month I ovulated soon after my period!