Many congrats to her!
One of the forums I frequent has a woman who found out she was pregnant with honeymoon baby a week or two prior to Thanksgiving, but when they were out of town visiting family during Thanksgiving, she started bleeding and cramping. They went to the local ER who diagnosed her with a miscarriage.
Well the couple tried on the next cycle to get pregnant and low and behold she gets a BFP.

So she goes in this week for her 'girly exam' and the doc notes that she's measuring huge for her supposed 6 weeks pregnant. (so pregnant she may not have miscarried the first pregnancy).
The doc also notes the pathology report from the prior miscarriage did not find any fetal parts. Nor did the hospital do an US, nor was a followup US scheduled. Everyone jsut assumed miscarriage and tried to get on with life.
So now the conclusion is, she's either pregnant with twins, just huge for this early pregnancy, or she never lost the baby in her first pregnancy.
She'll find out what's going on next week at an ultrasound exam.