Removing Birth Control

I’m getting my birth control out next month!! I don’t get much of a period but when I do, it’s for one day out if the whole month. So far it has been 2 months since I got my last one. I share this info because even though I am removing my birth control, we don’t want to get pregnant. I am going to use nfp when u get my period but for now, I’d like to using ovulation strips and bodily signs to track my cycle. For the moms who used ovulation tests, please let me know the cheapest best tests you used!