If you've had unprotected sex, then yes it is possible that you could be pregnant.
If you have had one negative, and one possitive result, then I would suggest seeing a doctor. It maybe that you are too early for some test to pick up on your HCG levels. Actually, the doctors office that I went to used First Response :) which was the same test that I used before I went in. Why don't you try that brand?
I'm 9 days late, had a positive and negative test. I've been peeing alot, low back pains, heartburn, gas, and now suddenly ive been feeling really lightheaded and dizzy on top of being real tired for the past week now.
Any thoughts on if I'm really pregnant?
Our periods can become out of wack for all sorts of reasons. Have you been under alot of stress lately?
You have my deepest warmest thoughts for your miscarriage. A miscarriage is a terrible thing to endure, I know from personal experience.
Give us an update, PLEASE. =) I hope you got your BFP!!
I went thru the same thing, I lost a baby in Sept of 06, and in Sept and oct of 07 had no period, but neg test results. In Nov, I had a positive, and due in 4 weeks!. Dont loose faith or hope!!! It is easy to get discouraged after a miscarriage, but it WILL happen!! Keep your chin up!
If you are worried, go to the dr and get a blood test, it will tell for sure!
Good luck!