Alright, I am very early pregnant. VERY early. In fact my period is not due to start until tomorrow. However, I have been getting a strong positive (with Answer which I have found to be the easiest to read and darkest positive line on hpt's) for 4 days now. I know the early detection tests say you can test 4 days before your period is due so it is resonable that it showed up, but it even showed really faint on a clearblue and those things are crap and barely readable even well into pregnancy. Soooooo, I am wondering what could cause me to have excessively high levels of HCG. I know twins can. Anything else, or could this be normal? I am 39 and have 13, 10, and 9 year old boys. ONE baby is wonderful (I really wanted one more before it was too late) but I am freaking out at the potential for twins!