When I had bloodwork done yesterday to determine my hcg levels, the level was at 18. The HPT I used should detect a positive at 25miu. My HPT's are clearly positive, yet light. Do hormones fluctuate that much? Crazy! My cycles are usually 35 days long. I got a BFN on CD36 and a BFP on CD39 (when bloodwork was done). This is "normal" right? I can't stop worrying! I've never been pregnant before so I have a ton of questions! 
