Pregnancy After Partial Hysterectomy

Hi ladies! I am a 37 yr old female. I had a partial hysterectomy 7 yrs ago. They left my tubes and ovaries. For about the past month, I have had gradual weight gain, even though i've been dieting and about a week ago, I started looking like I was 4-5 months along. My stomach isn't going down at all. All of the weight gain is in my abdomen and in my breast. About 1-2 weeks ago, my breast started hurting and have gotton much bigger. They are very tender and they have gotten very veiny. A couple of days ago, I had clear liquid coming out of them. I have read all of the posts about pregnancy after a partial hysterectomy and researched on the internet. It seems pretty amazing! I went to the doctor yesterday, and she wants an abdominal and pelvic sonogram done. I think it has freaked her out too. I haven't taken a pregnancy test yet, but from what I have read on here, it probably wouldn't show if I was. Are there any other conditions that can cause the same symptoms as pregnancy?