Im working on a medallion starburst and putting it together is driving me crazy. I can not do the y seams-it puckers at the square. I have already got so frustrated I have put it up. I have cried.lol I'm half blind anyway and the brighter the lights my transition gets darker on my glasses. Trying to pick out black thread on black is driving me crazy-I am about to put the quilt pieces in a box and take it to the dump.LOL I need help bad. Thanks