It seems you have gotten alot of good advice, but I am also going to put forth my two cents as well. When you are seeing spots and blurred vision, you should go to the doctor or hospital ASAP. That, in combination with the swelling and heartburn is definite signs of toxemia/preeclampsia. There is a rare version that your blood pressure does not go up until it is tto late. I myself got to experience that with my first child. This version of toxemia pretty much goes undiagnosed until your so far gone that your blood pressure finally spikes and you go into seizures. Myself, I had HORRIBLE heartburn from the get go and so bad by the end of my pregnancy that I could not lie down and was eating about 20 tums a night to try and sleep. I was swelling at a rate of 5 to 13 pounds a week! I started throwing proteins in my urine so I was being watched carefully as I was beginning to be symptomatic. The doctor kept asking if I had any frontal headaches or blurry vision, which up until the day I went into the hospital was a no. One morning I woke up with a headache I could not get rid of ( I happened to be on bed rest as well due to 13 pounds of additional water weight gain) so I called my OB/GYN - she sent me to the emergency room - my blood pressure was something like 170/110 - stroke level. They admitted me as I was also having contractions I could not feel. This was 31/2 weeks before my due date. The next morning I seized and they took the my son by emergency c-section. I was on heavy doses of magnesium for 3 days. My son was only 4.5 pounds and 18 inches long - way small for only being slightly premature. Here one of the side effects of toxemia is that your uterus quits growing, so does your child. Next, I found out that the heartburn was not heartburn, but liver enzymes as my organs had begun shutting down due to the toxemia. Ultimately, everything turned out to be fine, but it was a a traumatic birth experience and could cause long lasting damage to myself and my child.
So, long story short, NEVER feel like you are being a pest - your instincts are telling you that something is not right and you need to make your doctor aware of that. If you have the blurred vision, your blood pressure might be spiking. Also, most of the time they do not do blood workups unless there is a problem - maybe you need one. It is better than a seizure and emergency delivery or worse a stroke.