Hi,
Welcome to the ehealthforum and I am really glad to help you out. If you are not getting regular contractions of the uterus, it needs to be evaluated from your gynecologist. It is good that the monitor and the heart monitoring depicted a good fetal heart rate but an ultrasound scan is also necessary to rule out any trauma to the gravid uterus, fetus or placenta.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care.