My parents, friends, boyfriend and extended family were wonderful when they found out I was pregnant first time around. My parents were disappointed yes, but supportive. They helped me by giving me the same amount of money I had in my bank, and saying they would match what I saved as long as I spent the money on the baby. My friends were delightful, thrilled to find out they were becoming 'aunties' I was given a wonderful party, and they clubbed together and brought me a pram & car seat, along with toys, clothes etc. My boyfriend was over the moon and couldn't believe we'd been blessed with a child so soon after the abortion I had just 11 months earlier (only my boyfriend knew) and took it as a sign that we were meant to have children, and on discovering she was a girl, my whole family, boyfriend and friends included, went bonkers with pink items, wallpaper, toys and everything else a girl could want! After saving all this money, when it came to it, there was very little, other than a cot & changing mat that was actually left for me to buy!
Anyway.. moving on to the problem.
I now, after taking a HPT know that I am expecting baby number 2 and will find out how far along I am at my dating scan on Tuesday, My boyfriend, once again, is thrilled that our daughter will have a sibling, and is hoping on a boy

, however my mother's response was less than desirable.
She is convinced that after 'finally getting [your] life back on track' I am throwing everything away again, and is convinced that baby number 2 will stretch our finances too far, that we will be cramped in our flat, unhappy, and that I will not finish school.
I do not know how to explain to her that this baby is a blessing, that I am thrilled to be expecting again and that I do not want to have another abortion.
How can she have been so supportive when I was pregnant at 16/17 and now so unsupportive now that I am 19, and so happy & ready for this baby?
Any advice on how I can convince her that I am not a 'baby mill' and that all I care about is 'the attention I get from pregnancy and babies'?
The things she is saying are hurtful, and I don't know how to deal with it, having not had to deal with such things first time round.