Thank you for the query.
As you are a technician and you use to expose to the radiation
frequently there might be a chance of the miscarriage
but usually n early 20 x-rays are needed which are directly exposed to pelvis region to get a miscarriage.But you have mentioned that you did not took good protection at that time so that increases the risk of miscarriage.I advice you to ask your doctor for the reason as there might be so many other causes like chromosomal abnormalities at the gestational age
leading to miscarriage.Thank you.