Food for thought.
Meditation is a state of being without thoughts, with clean mind and open heart, just spiritual silence, mostly focus on the inside. When meditation starts, the best is to focus on the head, let all your thoughts go and open your heart by breathing deeply.
Vibrations comes, they are spreading. Your task is to open them up. The best way is to do nothing specifically about it. Don’t worry if you feel you have problems. It happens that people come to meditate and have a lot of trouble with blocks and problems in chakras. You don’t have to worry about that. Let the vibrations flow and it will resolve itself.