At my first midwife appointment, at 10 weeks and 4 days, and I had trace amounts of blood in my urine, they said it might be nothing or might be the beginning of a UTI and to drink lots of water and maybe cranberry juice. I drank lots of water and never saw anything more, and at my 14 week appointment it was peachy - everything was great!
On that note, I had my 14 week appointment yesterday. Everything was perfect. Heard the heartbeat, 152 (it was 150 last time), my uterus measured right on schedule, my blood pressure was great, and my pee was awesome. I gained 1lb "officially" (by midwife measure, from last appointment). By my measure, I have gained 3lbs since pre-pregnancy, which seems right about right. Everything is great!