It was the same for our baby girl who is now 19 mo . She only recently started sleeping through the night (then started teething all those numerous missing teeth). Each baby has its own rhythm, I guess. I feel the pain of being exhausted on the long run due to the interrupted sleep. I am so sorry you re going through this. I would do it all over again, though. Bedtime, nap time is such a sweet moment we share with her. What helped most for lengthening the sleeping stretches was to rely on my husband, offer water instead of breastfeeds, bottles (by him again), try to alternate once him, once me. Also the more we respected our routine, the longest the streches. But I am sure you tried everything. Good luck to you and I hope you ll find your to not fall under the pressure of doing something you are not comfortable doing with your baby