I'm 20 years old and eat healthy, exercise and take vitamins daily. I also brush my teeth regularly, every day. In the last 3 days or so, I've noticed that my bottom front teeth, on the gums are these small red veins that all of a sudden showed up out of no where. I'm really worried. I haven't been to the dentist in about 3 months or so, and my insurance just got cancelled, so I can't make an appointment right now, but when I was there he said my gums looked beautiful and there wasn't any sign of gum disease or anything. But no these veins show up when they weren't here before!
Is there any insight about this? ):

Those veins CAN be a sign of ulcerative gingivitis which is potentially very serious OR an infection OR a vitamin deficiency.

You really do need to see a Dentist.