Congratulations on getting Panga home at last and on her weight check! But I would not call her breastfeeding (BF) a nursing strike -- I would call it very typical post-NICU-discharge behavior. She is making a huge transition from NICU environment to home -- you all are. And she's had lots more oral experiences than the average 39-40 week term baby. I know few (if any) preterms who came home fully BF -- it usually took a few weeks beyond full term due date. There is no "must be fully BF by..." date on babies. Some need more time than others to learn, but virtually all need some time. You and she have really been doing pretty darn well!
Panga will know when she is ready. Let her lead the way via baby-led latching. Don't place pressure on her or yourself about BF. Consider all BF as "practice" -- she'll let you know when she's ready to move from practice to proficient. In my more recent experiences helping moms of premies, almost all transitioned to BF via kangaroo care (mother-baby skin-to-skin contact) prior to feeding time. Since she needs to be held almost nonstop, try to do this skin-to-skin as much as possible. I'm including a couple of links to info re: baby-led latch via skin-to-skin contact and a couple of sites for clothing that allow one to kangaroo while getting about one's business...
KangaCarrier http://www.kangaroomothercare.com/Ka...r_brochure.pdf or http://www.kangaroomothercare.com/story01ad.htm
Hang in... Celebrate how far you and Penga have come. Live in the moment and know things can get better... And as hard as it may be, keep up with regular pumping at least 8x per 24 hours until Penga begins BF (removing milk) effectively.