What to Do?

I don't know what to do.  Lily jumped out of her crib for the first time yesterday after her nap.  I was napping too and I usually hear her when she gets up and she will just play in her crib for a little bit or she'll yell for "momma, momma, momma."  I didn't hear her wake up or playing at all. All I heard was a big loud "THUNK" and then I heard her screaming.  When I heard the thunk I probably jumped ten feet in the air and ran into her room to find her lying face first, belly down on her floor.  She had a little bit of blood running from her nose and she was holding her right wrist a little bit.  I called my dad and Jason because I didn't know if I should take her in to get checked out.  She wasn't crying like she was hurt, she was crying like she was scared.  My sister came over and I decided to just watch her for a while to see how she acted.  I took her clothes off and looked her over from head to toe and I couldn't see anything.  I kept bending her wrist back and forth and she wimpered a little bit, but then she was off playing with Madison so I didn't think she hurt it.  Later on it didn't bother her at all.  I let her fall asleep in bed with me last night before putting her in her crib, and I woke her up this morning so she didn't have a chance to "jump" again.  Do I just hope she doesn't do it again and really hurt herself or is it time to start thinking about putting her into a bed?  I just think she is too little yet to be in a bed.