Can switching contacts make your vision cloudy? should it happen?

Yes.: If you switch contact lenses from one company to another, even if they are the same power, there can be some difference in vision due to the lens make up. Generally, the difference should be very small. If the difference is great, the powers need to be checked for correctness. If you switch contact lenses between eyes, your vision will definitely be cloudy unless both eyes have the same power.