There are also some stretches you can do to relieve the pain. Sitting and place the leg on the affected side of the opp knee (ankle over knee) and leaning forward often gets a good stretch there. A physio will be able to help you manage sciatica pain.

If you're experiencing huge amounts of pain followed by blackouts or dizziness, it is likely that your blood pressure is HIGH during those moments. A common physiological reaction to pain is an increase in blood pressure, breathing, and heart rate as well as sweating. If you feel like that, sit down until it passes. Take deep slow breaths to try to bring your heart rate back down.

If this has happened more than once, I'd get it checked out hon