My work was reverted!
Stay calm! If your work is reverted by another editor, it is your responsibility to open a dialogue with that editor about why the work was removed.
Do not add anything back until you understand why it was removed and how you can fix it. If you do add reverted work back without going through these steps, it will be seen as an edit war and your account could be blocked.
You can always reach out to your Wikipedia Expert for advice.