Yep its totally normal.
I had a mc two months before i got a bfp with this bub, every twinge etc i freaked out. I still check my undies for blood etc. Last week i took myself to the hospital as i was worried i was losing this little man at 25 weeks and it alos happened to be the EDD of my lost bub, it was not the case. Just an overactive mind.
Im glad the midwives were great and put my mind at ease.