Tips or tricks??

Sweet Mama

I find myself exhausted and frustrated trying to get my 4 month old to nap. It goes well for a little while then turns to crap. We rock and nurse, then swing, or crib, bright room or dark room. I feel like I've tried every tactic I know. Any parents have some good tips, tricks, or suggestions? Baby sleeps in the crib at night 5-10 hr stretches and getting about 11 hrs sleep at night if that helps anything..