What I think you need are firstly REASONS to get better control, and KNOWLEDGE of how to achieve this.
You have to find what motivates you. For me, it was going into a clinic when I was 19 and seeing it filled with other people with diabetes who all looked like they'd either just come back from WW1 or the elephant house, and in some cases, both. It was filled with people with barrel shaped bodies and missing limbs, hair, teeth, some in wheelchairs on oxygen tanks...and at 19 that's a hell of a wake-up call. That's what happens if you don't look after yourself. That's part of the reason why I treat my diabetes. All those people were 'diabetics'. I'm a person with diabetes. I will NOT end up like them. I refuse to. My future is in MY control and I will not be sat in that room in 10 years' time unable to breathe or walk.
But of course, not everyone responds to that motivation. So if that doesn't work for you, look for other reasons to stay healthy. You say you were pregnant so I'm assuming you're a mother. Do you want your child to lose their mother at an early age? Do you want to see them when they win a prize or graduate from school? Do you want to be able to stand up at their wedding? Do you want to be able to see your first grandchild? All this might seem years away but it might be motivation to take better care of yourself.
Whatever, you need to find a REASON. You need something real-world, something measurable, with real links to what happens to your diabetes if you don't treat it.
Once you've got your reasons, you need to find ways to help you acheive that. At the very least, I think you should learn to carb count. You're on fixed doses. You won't ever get good control on fixed doses and it certainly won't ever be easy to manage your diabetes like that. Don't worry about this yet. Find your reason first because if you aren't motivated to test or even inject at the moment, you certainly won't be motivated to work to your insulin:carb ratio or read packets etc.
In the first instance though, once you've got your reason, go for baby steps. If you're not even testing and injecting regularly, make that your first achievable goal. I wouldn't even worry about what your blood sugar is doing right now; you should start getting into good habits again. See if you can go for a whole week testing four times a day and injecting for every meal - once you've started that, you're well on your way to turning things round and making a difference.