I lost 35 pounds in less than 4 months, now i have gallstones, im sure it's from that. how unlikely is for them to dissapear on their own?

VERY unliklely BUT: The standard treatment for gallstones is removing the gallbladder; i believe this should be the last resort rather than initial treatment. I've had many patients have great success with natural therapies to dissolve gallstones & flush them out of the liver/gallbladder. See http://www.Townsendletter.Com/july2011/momiracles0711.Html & the amazing liver and gallbladder flush by andreas moritz.

Not very: Likely. You may try to modify your diet or take ursodeoxycolic acid. But success is limited.