Photoshop randomly blurring my images?

Hey guys I need some help, so I'm no photoshop pro but I am comfortable with what I do which is photography. Most of the stuff I do is pretty simple, sometimes I'll add text or add 3 photos onto one 4x5 canvas and have them on top of eachother vertically. Basically I've done this thousands of times and it always works. Usually I will just edit my photos in Lightroom, then I will click the edit in photoshop button, drag it over to the canvas with the 3 vertical photos template. And resize. It never blurs or loses quality. And even to combat that, sometimes I will export the photo from Lightroom to my computer and then put it in photoshop. 

I was doing a good amount of edits today when all of the sudden my stuff started getting blurry... on Lightroom it's crisp and clean, when I download it it's crisp and clean, but for some reason when I put it on photoshop, it gets pixelated and blurry? I have changed anything so idk why it randomly started doing this? One thing I noticed is that when I click the edit in photoshop button on Lightroom, the image comes in extremely large. I figured maybe for some reason when I was making it smaller it was changing the pixels so I downloaded it as a small image (crisp in Lightroom and on download) yet as soon as it's in photoshop it gets blurry again? 

if someone could help me out that would be great because I pretty much can't edit until my photos are clear and crisp. If you have any questions for my settings or anything lmk but again it has worked 10000 times and I didn't change anything so I'm stumped. Here's some images to make it more clear