Questions about my own health?

I am having my own issues to deal with here with my own problems. I keep feel like I am in depression again but a little different than I was last year with my ex-husband. I never have childern. But now I was with another guy who I thought he was in love with me. I keep on having a gut feeling that I may be pregant, after took two home preg testings and they were neg. and then I went into depression because my ex-boyfriend left me and went to er for depression, be without water (which I drink a lot of water though), broncitis. I told the doctor that I was not too sure about my preg. so he took my blood and unrine test for preg. it also turned neg. I am still feel like I have been eating a lot and some other things that some of preg sysmtoms (sorry about my spelling). Am I still can be preg if I am very conren that I am?

Please let me know. I am really apprecate for your tips and adivce. And one more question, what is your experince about those preg tests? Thanks.