It's normal to have lower blood pressure during pregnancy. your body has doubled the amount of blood now. It's better for it to be low than high. Mine has always been low but my doctor isn't concerned because I don't have fainting episodes. If you have blurry vision or faint, then it needs to be addressed with your doctor. As far as weight gain/lose, everybody is different. Some people lose weight all the way through and they'll give birth to a 9lb baby. Some people lose weight because of lack of nutrition. There's really no way to tell. So I'd suggest asking for an ultrasound to see baby's development so far just to be safe.