Trying to conceive...but having doubts waiting for pregnancy test.?

Point blank, I'm having a nervous breakdown. I want to be pregnant SO badly, but I am fearing I am not. My period isn't due for a few more days, and I've anxiously tested twice. Out of anxiousness, I tested way too early and got a negative result. ( because the last time I got pregnant I tested 2 weeks before my period was due and got a positive result..but I just knew.. ) I tested poorly last night, but with very little urine but I just had to. Negative. :( I'm getting discouraged.

My body isn't totally off whack either, but I am feeling nauseous at the same time every day, and its been like that for 3/4 days now. A few times during the day I would get a throw up feeling in my mouth, but its not been regular. I don't feel like I can taste much, and usually am having a nasty taste in my mouth even after brushing my teeth. I'm starting to feel bloated, which I always bloat real bad before my period so I'm nervous. But I also feel like my stomach is tighter, not just bloated.

Not having any breast tenderness, but I never did with my other pregnancies until second trimester, so I'm not really going on that, even though all are different. I'm just losing my grip/mind here caused I've tested twice now and got negatives. (although i did use the cheapest test I could find..) I didn't test the best way I could have either times and still way early..but I'm starting to convince myself that its just not meant to be and this is all in my head.

So my question is to any of you.. have you been through this like this? Does it sound like I may be pregnant or just nerves, mind games and period bloating? If I've tested twice and got a negative should I pretty much shut up and give up? I hate this waiting game......