help with losing last 15lbs

Adrienneburrows1

I am 40 yrs old and it seems harder than ever to lose weight. I have managed to lose 30 lbs but I have 15 more to go and I'm kinda stuck. I lose a few and then gain a few back. I don't know what else to do to get rid of the last 15lbs. I eat 1200 calories a day and I walk/run 30 mins a day. What should I be doing different? This has been working up until now. The 30lbs came off within 5 months but this last 15 just won't go away. Can anyone help? Would be great if I had a motivational buddy.