Bleeding at 3-4 weeks?

This is for a friend of mine that just found out she's pregnant. She is about 3 to 4 weeks along and she's been having mild bleeding all day. This is her second pregnancy and i don't believe she had this with her first. She's currently still waiting to be seen at the hospital but i wanted to see if you ladies had experienced some bleeding (little to no cramps) and everything turn out okay.

I just had my second baby on the 13th and didn't experience this with either of mine, so i don't know anything about bleeding, besides implantation bleeding that occasionally happens to some women.