Still confuse.. Please Help..

So I still haven't seen AF yet. LMP was 5/27/15. I had lite pinkish discharge on 6/23/15 nd after that I haven't seen a drop of anything. I've took 3 hpt all bfn, I've even went to my doctor nd got a pt done nd it was bfn... I've been told to get blood work done.. I'm just so confused... I went thru something like this with my first pregnancy. So I'm wondering could I be pregnant nd just need to find out thru a blood test... What do y'all think...