Hello!
Thank you for the query.
According to your description, you probably suffer from heart
arrhythmia. This is a condition when heart spontaneously beats irregularly. This is a very common heart condition. In most cases hearts gives an extra beat from time to time and after that beat, there is while for the heart to come back to normal rhythm. This is what you find a lack of pulse for a while.
Such condition in most cases is harmless however it should be diagnosed and it is necessary to find what kind of arrhythmia it is.
Moreover,
pregnancy is very often associated with heart arrhythmia, and so is
anxiety. So we can find pregnancy, anxiety, and ions shortage (especially
magnesium and calcium) as an often reasons of such condition.
Short ECG can not find it, you should have Holters 24 hours ECG, it should tell if and what type of arrhythmia you suffer from.
To ease your symptoms it is advisable to have magnesium supplementation and visit
psychiatrist if you can not deal with your anxiety.
Hope this will help
Regards