Hi. Just thought I'd give you a little input, since I am an ultrasound technologist and do A LOT of OB ultrasounds for ER patients with bleeding. At six weeks bleeding could be from a lot of things. You could have a subchorionic hemorrhage (bleeding around the sac) depending on where this is located and the size of it, it may or may not be a problem. If it is small or in front of the sac, it will probably be ok. If it is large, or behind the sac, it could be an issue. Also, an ectopic pregnancy can cause bleeding. Typically, you will have severe pain with this, but not always. And, as some have mentioned, it is possible to still have 'periods' while pregnant. Also, I work with a lady who was pregnant with twins and had a lot of bleeding early in her pregnancy, she lost one, and the other is great, but it caused a lot of concern for her. Either way, you should be having ultrasounds, to see if you have an ectopic, which is a very serious emergency, and to see if you have a bleed around the sac.