I don't think it's ever time to cry it out. I think even supporters of CIO will tell you 6 months is a little too young. Is baby nursing? Teething in particular will bring on the need for more feeding (be in breast or bottle and more cuddles, and disturbed sleep)
You may or may not believe in using some of these suggestions, but hope one of them or many can help-
Try rocking to sleep
Co-sleep-very easy if you're nursing
shorten naps or take one away
adjust feeding schedule
walk with baby while she/he sleeps-the teething may be bringing on a need for even more touching and cuddling
introduce solids if you haven't already to get baby more full, hunger could be part of it, or reverse, stomach ache could be part of it, again, happens with teething.
My son is 27 months old, has never CIO, still breastfeeds, (obviously he eats a full diet as well) co-sleeps and I am so happy I made these decisions because he just started cutting molars and it's almost like reverting back to 6 months. He's needing lots of cuddling and rocking to get through the pain.
Whatever you do, just do it out of love. Best wishes!