Tired

I am tired.
Of course I'm tired. I'm 34 weeks pregnant. I have a 2-year-old. I have four dogs.
For all I swore I wouldn't, I am now letting (if that's the word) Cee cry herself to sleep when she wakes up in the night. I hate it. But she has been waking up again and hollering "Mommy, rock" or "Mommy, bed" or just plain, "Mommy", and when I would pick her up and rock her, I couldn't get her back into her bed. So I put her in our bed. Which meant that no one really got any good sleep. So, since I know there's nothing else she needs (she's not sick, teething, hungry), I've been letting her cry for 4 nights. I think I'm doing the sort-of Ferber method, which is going in at 5 minutes, 10 minutes, and so on. The first night, it took 70 minutes. Night #2, 50 minutes. Night #3, 8 minutes (and I was so hopeful) but last night took an hour. So here's hoping that this works in a few more nights. Cee has put herself back to sleep many, many times before, without crying and needing to get up, so I also know that this is in her capacity. But I need her sleeping decently before Little Girl #2 arrives sometime in the next 6 weeks, because I know no one's going to get any sleep for awhile after she's born.
I just wish I wasn't quite so tired now.