Thanks for the query.
The chances of pregnancy
are less, as:
-You are using some contraceptive
-All the three pregnancy tests
The symptoms you are experiencing could be side effects of the contraceptive method.
You cannot feel fetal movements till around 18weeks of gestation.
So the movements you are thinking as fetal movements can be bowel movements.
You consult gynecologist and undergo ultrasound
which will rule out the possibility of pregnancy.