Newbie wants to loose 20 lbs

Hey all! I just joined this site yesterday and am excited to meet people who are in the same boat as me I'm struggling to loose 20 lbs that I've packed on since grad school and have read (and experienced!) that this is a difficult amount to loose. It's not enough that the pounds fly off, but enough that it's annoying that they don't! I started trying to loose about 4 months ago and have been running 3x per week and logging food. No results so far. I just went to a nutritionist who referred me to this site and said I need to cut more calories.

Anyone else in a similar situation or have a success story? I'm hoping this site will boost my motivation and give me some results. Thanks!