Hi, I’m new to mumsnet but after reading some really supportive threads recently I thought I would post for some advice.
A few weeks ago I found out that I am pregnant with #4. I only did a pregnancy test in order to have the coil fitted. I’d previously been on the pill but it wasn’t agreeing with me so I had a couple of weeks break where we used contraception at all times. We had just one instance where it broke - I can even remember the exact date - away on holiday abroad. Never in a million years did I think it would lead to anything (I hadn’t got pregnant easily with my other 3 at all) so I didn’t think anything of it until the positive test knocked me for six. I felt upset, annoyed, scared and hugely shocked. I cried for about a week as we were most definitely “done” and another baby wasn’t part of the plan.
As time has gone on, I’ve been to the abortion clinic (they couldn’t do anything on the day as there was nobody to do the scan and I didn’t have a period date to go off), I then didn’t go back the next week but instead decided to have a private scan. I think I was thinking if there was one baby I would go ahead with it, but anymore I couldn’t. Saw the baby on the scan and felt more positive for about 10 days. I then had a huge wobble a couple of weeks ago where I started phoning the abortion clinics again but appointments were hard to come by. I then kept busy and had another positive couple of weeks but I’ve had another big wobble this weekend. My husband thinks I’m just playing a stupid game which I’m really really not. He also thinks I’m getting quite depressed by the whole situation. I just try and stay positive then a tidal wave of negative emotions hit me from nowhere and I feel like I can’t go through with having another child.
I feel guilty for not feeling happy and excited about this pregnancy like I have with my other three. I don’t know why I don’t and I feel so awful about it. I am worried what if I feel like this all the way through or end up with postnatal depression? I worry what other people will think - I know this is so silly as I’m sure nobody will think anything but I don’t want to be seen as having a “tribe” of children. I know that sounds completely unreasonable.
We can afford a fourth child, we have a big enough house and a big enough car. I worry about having a baby with a toddler - I’ve always had a good age gap where as I will only have 18 months this time.
I’m just so confused. I feel awful, I can’t shake not feeling happy and I don’t feel like I can talk to anyone. I think about it constantly. I keep looking at photos of people with 4 children and thinking “can we do that?” - I know I’m just overthinking everything.
I am really aware of time going on as I’m ten weeks already - I know I have to make a decision this week really as I promised my husband I wouldn’t get to 12 weeks. 
Any advice or help would be appreciated.
Sorry for the long rant!