About feeling discouraged, I certainly understand how you feel. With fibromyalgia there comes a brainnumbing thing called fibrofog, which causes us to do things that seem perfectly right at the time but are in fact not. For example the other day I was doing the math to add borders to tshirt blocks so they all come out the same size. Now I know how to do this, have done it many times. But this time, for about half the blocks, I added the half inch seam allowance before I divided by 2 instead of after. So of course, all the blocks where I did that came out half an inch too small. Sometimes I only did it on one set of sides. LOL... when all were cut, sewn, pressed and on the design wall, DH says to me, why aren't they all the same size. Of course they are!! OMG, no they aren't!! Why aren't they? So as I sat and frogged all the ones that were too small, I tried to figure out what went wrong. Went over and over the formula, the steps, etc. No, I had it right, so frustrated, so discouraged. Then somewhere in there it occurred to me what I must have done.
I loveeee those beautiful paperpieced stars and quilts with the sunbursts and all that, but I know I won't ever be making one because I would get lost in the fog and never be able to follow a pattern that complex. I have made peace with that, and am happy and content to stick with simpler patterns and designs. I get my challenge in trying to design a few patterns of my own now and then. And in trying to do basic math correctly. LOLOL
Hugggs and smiles for you, always know you are not alone in your frustration and that many of us are out here who understand what you are dealing with. You are welcome to send me a PM any time you feel the need to vent!!