Thanks for posting your query.
The side effects of enough severity are possible with Zoloft
which is sertraline
All the side effects you are having are possible with sertraline and 12.5mg is a quite meagre dose.
So i would like you to get a review for some other antidepressant if required and Zoloft better withheld forever.
Hope I have answered your query.
If you have any questions I will be happy to answer.
Please close the query if you have no other questions.
Wish you a good health.