Can Periodontal gum disease be stopped?

I'm only 25 and I got diagonsed with periodontal gum disease in Feb. I haven't had the time nor money to go see a periodontist but I am going to go on Tuesday to get a consultation...The dentist in Feb told me I am beginning to moderate stages...I so don't want to go into the advanced stages! Can it be stopped any further? When you get the treatment do your gums stop being inflammed? I'm going to ge the treatment done...I just want to know what will happen..I am going to also go every 4 months to get the cleanings done..But does it stop from going any further? Also...my bottom gums are receding..I have brushed every day and everything for a while and this is still happening!