CIO Day 2, while baby is teething

It takes him 45-1hr crying before falling asleep. He still waking up twice to feed which I don’t mind. He is teething too. He is eating less as well and taking short daily naps instead of long like he used to. I still carry him to sleep during the day. He sleeps longer that way. Am I missing something? Sleep courses costs like $300-400 which I don’t have. I was just thinking that my babe can’t rely on sleeping with me forever which I love to but my mentality is not going well hearing the susher all night and not having a personal time with husband since I gave birth.

Babe is 6 months now. I don’t know if I should continue or stop because his cry makes me sleepless at night to, makes me feel the guilt.

What age did your babe sleep in the crib?

Do I need to let my babe complete teeth to come out before letting him soothe himself?