You should have mentioned why you took ECG in the first place. That information helps a doctor to rule or specific issues related to heart diseases.
The ECG looks quite normal to me. However, if you are too anxious, you may visit a cardiologist for second opinion.
Next Steps
Personally I would suggest you to remain calm.
If you're very much anxious, you'll have to find a doctor to share your problems with and find a solution.
Anxiety is not good in the long term.