9 weeks pregnant. Light bright red spotting!

Amanda
Ok ladies, please let me know if any of y'all have experienced this. I called my doctor, and she said she was sure there want nothing to worry about, but offered to do am ultrasound tomorrow. Which I'm definitely going to do. My fiancé and I had sex this morning, and this afternoon at work when I went to the restroom I noticed a dot of bright red blood when I wiped (sorry tmi). No cramping, backaches or anything, just my usual nausea. Have any of y'all experienced this? I've read that it's common, but lets face it blood no matter how light make a pregnant woman nervous. I would feel better knowing if y'all have had the same issues with a good outcome.