No period yet but Trying to get pregnant

Richelle
No period yet but Trying to get pregnant 7 months PP.
I'm currently exclusively breastfeeding so my period has not yet returned, which I'm fine with however, we are wanting to try to get pregnant again here soon. 
Has anyone tried and successfully gotten pregnant by any particular method before their period came back? My tentative plan right now is to pee on an ovulation stick everyday just to see where I am. But this is expensive. I have no desire to do the basal thermometer test it's not sensitive enough in my opinion especially with cold and flu season coming up.