Could it be twins?

Jennifer • 2 year old son, 2 angels and pregnant with hopefully our rainbow.
My friend told me to read about gender predictor old wives tales. Found the one about the ring on a string and when I hold it over one side of my bump it predicts boy and the other side predicts girl. No family history of twins but I'm 35 so I could have released two eggs. Anyone try the string and it be accurate? I'm only 5w5d and doc isn't until 2/25.