Why does my mind feel slow to think nearly half day after my meditation? I would like to know if I should expect any problems after I have done my meditation in the morning for a half hour? For the whole morning afterwards, my mind felt very slow to think of anything. Is that a good or bad sign?
Re: mind feeling "very slow", "very slow to think of anything" -- when someone tells you something, can you reply immediately without thinking? That's a sign of good meditation.

If your "very slow to think of anything" just means you are going around basically without thoughts, and you can respond to anything spontaneously with no blockages / no doubts - that's good. While, if your "mind very slow" means you can't respond - that means your meditation was basically cultivation of sloth/torpor.

It is said, if your meditation is wrong it can be a cause of being reborn in an animal world! Meaning, if in your meditation you generate "laxity", then you are only training in making your mind dull, like the mind of a cow or sheep! So you need to know what is laxity in real experience, and must be able to recognize it when it arises. Laxity is when your mind is not sharp and bright during meditation. Meditation mind should be very sober, not like a drunk mind or sleeping mind.