Help..

Okay so my husband and I have been TTC for 6 months and this last week I haven't felt myself. I've been nauseous, I've had random headaches, I get dizzy when I stand up too fast, my boobs have hurt around my nipples almost every day all week, and I've been tired more than I normally am. I'm no where near stressed out about anything. My period isn't due for two more days and I went ahead and tested Friday night. It of course was a BFN, but could I be pregnant and just tested too early???? My husband and I have a very active sex life no doubt. So I'm really hoping I am!!!