When should i try to conceive again?

me and my boyfriend have only been trying for a couple of months now but its still stressful to always look at the test and never see a BFP.ok i thought i was pregnant but yesterday i started my period. i also took a test yesterday before i came on my period and yet another BFN im getting frustrated... how long should i wait to try again or maybe i should just give up... i wish the rest of you the best of luck and baby dust to everyone=[ =]