four month sleep regression

Friends, forgive me for neglecting the blog. I have SO MUCH I want to write about but I've been walking around in a fog. Isabel has gone from being a stellar nighttime sleeper to a not so stellar nighttime sleeper. It. Sucks. Big time. Thankfully Alex has been such a tremendous help. He really is amazing and so hands-on when it comes to Isabel...but between her sleeplessness and Liam's toddler shenanigans we are TIRED. So I think we've decided to move forward with sleep training. ::break my heart:: Something has got to give. So pray for us as we embark on this journey and please leave any tips you have in the comments section, it would be most appreciated. Thank you!