It sounds totally normal. Your body can still have enough hormones to get you to bleed a little bit in early pregnancy, plus (from what your explaining) it could be implantation bleeding. But if you feel worried its always best to talk to your dr. Hugs, and hoping for a h&h pg for you.
Yes, sounds fairly 'common and normal'. Unfortunately there is not much you can do, otherwise than rest and keep an eye on it. Any increased blood/bleeding, pain/cramping then go back and ask for and ultrasound and a blood test to see if your hormones are rising. Best of luck