Getting frustrated.

Been trying to conceive for 6 months.. I'm 12dpo and I've had some symptoms.. Started with cramping, dizziness, sore boobs, tingly nipples, bloated, and the past 2 days I've had random nausea and slight pulling in my lower middle abdomen.. Tested this morning bfn... I've never had any symptoms with my period except sore boobs so I just have had a feeling that this was my month.. And I keep getting a bfn!! Is it still too early? ?