Well, no matter what the drug(s) is, it's how it's affecting you. So, please, however you do it, just stop.
Postpartum depression is real and can be very difficult. I never had it but my last was a very sick baby and I was so sleep-deprived that it caused serious health problems. I wouldn't let anyone (except my mom) take care of him. You need to take care of you. Getting out to exercise will help the depression. I know sometimes you probably feel like you can't put one foot in front of the other but I promise that if you just try, the exercise will help, along with your antidepressant.
Don't worry about the Celexa. When you're ready, just taper off it slowly. Babies and kids are a huge gift, but the truth is, it's 24/7 and you don't get much back in the beginning. Depression doesn't need a "cause." There are plenty of people battling it that seem to have everything in the world.
Stop now while you can without it getting worse.
Well it's not methadone. It's crystal meth. Didn't even know what it was until recently. My husband ask me why I'm so tired all the time and he thinks it's the meds. I have nothing to be depressed about. I have a beautiful home, great kids and an amazing marriage. I just hoped that I could pull myself out of this. It's super hard. The only thing that gets me down is being a new stay at home mom. I've always worked until I had my second. I just don't want anyone else taking care of my kids. I'll get right at the finishing line and I don't have the will power to walk away or just forget about it. You say a year??? That scares me. My doctor is weaning me off the celexa in October I'm scared of that too. I've never in life been in this position. I thought I was stronger and never ever thought it would get this far.
Please, please, please stop playing with the methadone. My heart breaks when I read how hard it is to come off. Your energy level with come back. From your post, it seems as though you aren't having significant withdrawals, but if you keep at it, you will. Where are you getting the methadone? I know how exhausting it is with kids. You'll be so much better off if you can get your energy back up through nutrition, vitamins, some exercise, and a little time for you. I know how impossible it seems when you have kids; I'm a single mom of four and finding time to take care of yourself seems impossible. But trust me, by putting yourself first and taking care of you, you are doing what's best for your kids. I promise you if you continue with the meth you'll regret it. You will miss so much of what your kids do. I was never addicted to my meds, but I was dependent, and they had me on a boatload, including Fentanyl, which was terrible to come off. But I missed so much due to just being medicated. I came off everything and it was very hard. I was on a ton of medication. I tapered and I was in withdrawal on and off for months at at a time. I'd have to say it was close to a year before I felt like myself again.
Give yourself and your kids a gift and get some support. This is a fantastic forum, but you need outside support as well.