Why the need to lose 40 or 50 lbs by April?
How about making a few small changes right now that will lead to you losing some weight while becoming healthier for the long term?
Check out Diet Central. See if there are any food programs that catch your eye as doable for your lifestyle.
Check out the Exercise area. Try to find an activity that interests you that you'd like to do a few times a week.
Most of us here aren't trying to lose the weight as fast as we can, but rather to keep it off once we've taken it off (regardless of the time). I will only caution that 110 pounds is a little bit on the light side for someone who is about 5'5" or so, and you may want to rethink it as you lose some weight.
In the meantime, you can do a lot to be healthier. Even drinking water in place of many juices or sodas is a start.
Keep asking questions and posting about what you're doing. We do want to help!