Dear Anjali,
The gap that has caused in your career is not exceptional. It is common amongst all the women. Career gap owing to pregnancy is not equivalent to education gap caused due to failing in the examination. Therefore, remove this sense of guilt.
Possibly the cause of your nervousness could be because of lack of knowledge. Confidence stems from the knowledge. Therefore, build the knowledge. Go through the discussions that take place on this forum. This forum is nothing but window to the outside world. People come up with whole lot of problem at their workplace. If you read those threads where seniors contribute their replies, it will be education to you. Secondly, be in touch with the HR books also. It will be helpful to you.
Earlier there was similar post. Click the following link to read my reply:
https://www.citehr.com/582470-need-a...-years-my.html
Thanks,
Dinesh Divekar