bulie, as the others said, this sounds really normal for this age. Don't doubt yourself or your body. It doesn't matter how your breasts feel - they don't need to fill up before you feed. It's also normal for it to become harder to get milk out when expressing as your supply settles down - it's a nuisance but can often be overcome. Do you need to express for any particular reason? Sometimes switching pumps or trying different techniques can help.
It's normal for poo frequency to decrease. It's also normal for the sensation of letdown to decreasse (it's still there, you just might not feel it so much and as baby gets bigger they can deal with it more easily so it's not as obvious)
If you need mroe advice, you can always call the ABA helpline too - 1800-686-2-686