Hi. I might be a little late in answering lately, a little ill, but will try my best.
First, when in doubt - Always see your doctor.
Second, From my point of view you are going to be a mom, as you have most of the symptoms already. Tests can be misleading, except for a blood test at the doctor's Check the following sites, they will help you understand what you are going thru now and will in the future. Happy parenting, and please keep us posted.
http://www.ovulation-calendar.com
http://www.pregnancy-info.net/pregnancystages.html
http://www.babyfit.com This one is free to join and has it's own forum. Also covers other questions you might have, diet, exercise, etc.