How can I gain 10- 20 pounds within the next 2 weeks can someone help me are there any pills or anything I can do to gain weight

How old are you? Why do you feel the need to gain weight?

I am 52 years old, naturally thin and healthy, however I recently had a about of depression lost my appetite and 18 pounds with it. I went from a size six to a size 3. I look like a 12 year old kid but I am the mother of three grown children. I have started to again and eat three meals and snacks of peanut butter and crackers in between. I drink lots of protein drinks, and fruit juices that are high in calories. Have gone to the doctor, there are no medical reasons for the weight not to start to come back. It is causing me to be depressed and miss work. I don't like my appearance and none of my clothes fit. I am 5'5 and went from 130 pounds to about 115 maybe less now. I do jazzercise but mostly the muscle tonining routines. I really need to gain some weight. Any suggestions?