Questions about conceiving???! Please help!

Ashley • Full time student and work as a nursing assistant at pinnacle health
So my boyfriend (of 4+ years) and I have been trying to conceive since January 1st (our anniversary and pretty much for 5 months now). We haven't had any luck so about a month ago I began checking my bbt and CM and using this app to assist us. 
​However, Ive been wondering if there are certain positions better than others for having better results with conceiving? Also, is there a brand of ovulation tests that are better than the others? I think that's it for now, but any advice would be greatly appreciated since I'm very new at all of this! Thank you!!