Do all feelings come from thoughts?

Curious to know where those feelings come from that are not the effect of a thought. For example, sitting in meditation when my mind is quiet, sometimes I will get strong feelings such as uneasiness or serenity or even intuitive moments. In those particular moments, I’m not having any thoughts at all. Perhaps, if any thoughts are existing they are neutral or have no emotional charge (i.e. simply being aware of a hum in the air vent). So if the C = meditating T = silence F = uneasy A = continue meditating