Hi
It's good that you have brought this question to forum.
Edible camphor in very trace amounts is used in the theetham, still it is not safe during pregnancy.
Since you have taken it only once and that too only less than a handful, it may not be enough to reach the fetus
Next Steps
Do not repeat it, and drink lots of water to eliminate whatever minimal negative effects it can cause. May be because of these reasons,
pregnant women are not advised to go to temple.
Health Tips
Stay safe, take care, take your routine supplements