Is the purse advancing thru the machine? If not, I would try to lessen the pressure on the presser foot. Might be a screw, lever or button. If you are getting nests on the bottom, sounds like the needle is OK. Is this purse made using the same fabrics and interfacing as the one you did a month ago? If you changed something, home dec fabric rather than quilting cotton, etc. It might just be too thick.