My bf think im pregnant but idk.

So ive been on the pill a while and so my bf and i don't always use protection and well we recently had a miscarriage so my cycle has been messed up since then. I took a pregnancy test and it said positive but the the control line never showed up so i think it was faulty but when i was trying to explain this to my bf all he heard was "positive" and i can tell hes still emotional about the miscarriage and i don't want to lead him on. Idk im scared that i could be. But i have faith we would make the best of whatever life throws at us. I just don't know how to talk to him about this stuff and like an idiot i already threw out the test so i can't show him what i mean.