I remember reading on here that giving up breast-feeding can cause depression and having a light bulb go on. I wish I'd known that earlier! This is what I found on the Kelly.Mom website:
It’s not unusual to feel tearful, sad or mildly depressed after weaning; some mothers also experience irritability, anxiety, or mood swings. These feelings are usually short-term and should go away in a few weeks, but some mothers experience more severe symptoms that require treatment. If you’re experiencing feelings that are affecting your quality of life for more than a couple of weeks, it would be a good idea to seek outside help.
What causes these mood changes?
There is very little research on the subject, but it’s hypothesized that hormonal changes are a primary cause of mood changes during and after weaning. One of the changes that occurs with weaning is a drop in prolactin and oxytocin levels. Prolactin, a hormone that is required for milk production, also brings with it a feeling of well-being, calmness and relaxation. Oxytocin, the hormone that is required for milk ejection (let-down), is sometimes referred to as the “love hormone.” It makes sense that a sudden decrease in these hormones could have an effect on a weaning mother’s emotions.
Are some mothers more likely to experience depression due to weaning?
The faster the weaning process the more abrupt the shift in hormone levels, and the more likely that you will experience adverse effects. Dropping no more than one feeding per week is gentler on both mother and baby. Mothers who are forced to wean before they are ready (or for reasons beyond their control) and mothers with a history of depression are also more likely to experience depression after weaning.
Your post sounded so familiar to me, in the dark days when I gave up breastfeeding DS (at 4 months) and then had to wean dd (at 6 months) when I went back to work. Really, it is hard so please do try not to make it harder by punishing yourself. You tried, and breastfeeding is not the be-all and end-all of being a good mother. We all know breastfeeding is optimal, but bottle-feeding is fine. It must be, because the majority of people born between about 1955 and 1985 were bottle fed, and we all seem to managing. I'm an absolute goddess, personally, so clearly bottle fed babies are capable of growing up fine. I won't say 'forgive yourself', because there's nothing to forgive, but let it go. It is at most a small stumble on the 20-year journey of bringing up this child, and as you say you've got an excellent bond with her, it is not a stumble that is going to matter in the long run.
As for the NHS, things have got better more recently, so i really think it would be worth going to your GP for some help. I did that last year after a close bereavement and got CBT with an absolutely lovely therapist and then a mindfulness course that was very good. Have a look-some services are self-referring so you may not need to go to your GP at all.
Ask your husband if you two can talk sometime, non-judgmentally, about how you both feel. I think this might be best left for a little while though, until after you've had a bit of time to grapple with your own feelings.