Hi, sorry to hear about your pain. No, it doesn't get 'easier', your memories don't fade (which is a good thing) and you still remember the good times as well as the bad. Your emotions are something to embrace. Losing one's parents is a path we all have to walk along at some point and we all will handle it differently. No one can understand exactly how you feel, even those who have lost their mum too. If you want to talk to her, then talk to her, aloud, quietly, however you want.
Things are actually as they were before your mum died, except you now have large amounts of wisdom you didn't have before. You have a family to be the best mum ever to. A family who also, will remember you as the fantastic mum that you are! Your life is far from empty what with all the commotion having a young family entails! Wrap yourself in your children and you'll find lots of love in them - do it now before they become grotty teens!
Make sure you're eating healthily even when you don't feel like eating (super important!) and doing some sort of exercise. This will help your body to help you.Spend time with friends / family to keep your social life active and to help ground you - seek out positive people to have fun times with, but also who appreciate you for who you are. Maybe join a club to meet new people. Don't feel guilty if you find yourself not thinking about your mum .
It sounds as if you and your mum had a very close and loving relationship - a special mum/daughter bond that will never be replaced and signals another step forward along your life path that you have to take. You wrote about the trouble and pain you suffered after having your last child and that you braved through it. Clearly you can deal with more than you actually realise!
Also, one thing which is really interesting to me: there's a branch of science (quantum physics) which calculates that there may be an infinite amout of parallel worlds filled with all of us where every possible difference exists - and stephan hawkings believes in this. e.g. did you put on a blue jumper today? Well in another parallel world, you actually put on a different coloured top. Did you rush to the shop to get some milk? In another parallel world, you rushed, tripped and fell in a muddy puddle! And because there are so many parallel universes, that means there are many, many of them that still have your mum in them, and she's still spreading her love to you and everyone else. So that's something to be happy about!