I had them from 13 weeks on. Mine were due to.low iron which we didn't find out I had until I was 28 weeks (at my glucose test) I've been taking a supplement ever since and they just quit about 2 weeks ago. I'm now 36 weeks
I figured it was normal, but like 2 day? For like 45 minutes!
It is normal, but could also indicate low iron.
It's normal its the increase in blood volume.