somebody please help I am lost with my hug levels that were taken

I am getting pregnancy symptoms like nausea, and very tired around 1pm in the afternoons, and I have a hard time getting up in the morning, but my doctor took an hcg level on me on the 21st (Monday) and it was .01 and then she retested on thursday the 24th. and it was .02 she told me that I am not pregnant, but if I wasn't why is the number higher please help me anyone. I also had some issues that you all may want to know first. I had a baby on the 31st of december 2007 and wouldn't stop bleeding at all, went through surgery to remove a polyp and had a d&c that was on March 28th 2008 and yet the bleeding wouldn't stop my husband and I were told that I have to have a hyterectomy, but we wanted one last baby before this happened at all. now heres the weird thing my bleeding started acting funny going to light then heavy then stop for a day and then back on again like a normal period, then on april 17th 2008 it stopped all together on the 22nd I had some very faint potty like two drops and that was it in my pad then nothing when I wiped from peeing. then later the next day I had very light pink when I wiped after peeing, and then later on in the afternoon that same day when I peed it turned brown, but it would only show when I wiped after peeing nothing in a pad or anything, now from time to time I see some brown in a panty liner nothing major though. The doctor said after my surgery that when she did the hyterscopy and lyproscopy that she noticed that my uterus was very thin, but can I be pregnant and just to early please someone help me. .01 on monday the 21st. 2008 and then .02 on thursday 2008 you can email me at ***@****