Dry poop and mucus when I wipe?

I've been having this problem for about two months. I've been constipated and my poop has been very dry. I haven't had this problem ever in my life and haven't changed my diet or exercise in any way. When I poop, it is very difficult to push it out, and it comes out in little pebble shaped blocks. Sometimes when I wipe, there's a mucus in the tissue that looks like I blew my nose. Any suggestions as to what to do about it? What to eat? Medicine to take? Help :( I'm so uncomfortable