I would not worry too much about this. This is a hot flush.
There are multiple reasons for hot flushes - hormonal changes, dehydration , lack of sleep , stress.....
Next Steps
1. Start with deep breathing exercises - everytime u feel that. take 20 deep breaths n relax. u can even repeat it 4 to 5 times a day
2. drink plenty of water and fluids
3. if problem persists despite following these for more than a week, then you consult the doctor