I am 30 years old and pregnant with my 5th child. I started out at 110 pounds and have gained about 14 pounds. So far I ve had low blood pressure and no protein in my urine (I think that s what they test for right?) I am 16 weeks along and am suddenly very nauseous. I had mild nausea the first 14 weeks but have been feeling great for 2 weeks until a few days ago when I started getting very nauseous and vomiting, especially at night. This has never happened to me before. I ve had 4 normal pregnancies where nausea ended around 12 weeks. Should I be concerned?