Hello, and I hope I can help you today. Many women experience skin changes during pregnancy. In addition moles or other spots on the body can either enlarge or develop, and they go away once the pregnancy is over. However, in your specific case, the fact that you are overweight gives me the impression that these bumps you describe are actually not bumps at all... Instead they are superficial veins called vulvar (or capillary) varicosities (you can look that up on Google and look at the images) very close to the skin surface that are bulging out more now because of the hormones of pregnancy and the pressure while standing on your vulva due to your obesity. You may later develop varicose veins in your legs which are also caused by the same risk factors. You might have just likely ruptured or scraped off the end of the vein which is what appears as a purple bump on your vulva, which is why it bled. Feel free to discuss this with your home healthcare provider and see what he/she thinks as well. I hope I was able to adequately answer your question today, and that my advice was helpful. Good luck and best wishes for the rest of the pregnancy, Dr. Brown