<human>: Give me a shortened version of the text

Hi everyone! 
First of all: thank you very much! You guys inspired me to lose weight and i've been doing great so far! You're the best motivation i could ever get. 

I started back in December 2011. I had 107kg (235lbs) and now I have 79kg (174lbs). My target is 75kg, my wish is 70kg. I'm 175cm tall (5'7 feet). 
In december 2012 I joined a local gym and started weightlifting. Thanks to weightlifting I lost about 15kg (33lbs) in 4 months. Sometimes I lost about 1kg (2.2lbs) a week, sometimes even more, sometimes I lost nothing. I try to eat about 1200kcals/day. Everythings good, right?
Well here's the problem: In my opinion I think i lose weight way to fast. 1kg per week is pretty fast. Of course I'm happy with the weightloss. But what should I do when I reach my dream weight? I can't eat more than I do now, which is about 1300kcals per day. Eating more would make me feel unconfortable and I would feel full. Should I do less sport? I do weightlifting every second day (monday, wednesday, friday/saturday). On tuesday and thursday I play soccer or run for 45 minutes.

There's also another problem: I am an hypochondriac. My father got bowel cancer one year ago. I know that he couldn't go on the toilet and take a shit and he had tummyaches. One month ago I got the same. I couldn't go to the toilet but felt that in my guts was shit. One week ago I could go again on the toilet and shit normally. But I still have to fart very often. I know that I don't have cancer, though I'm very terrified. I read that cancer could lead to weightloss, so I thougt that this would be the cause of my fast weightloss. But I'm pretty sure it's because of my diet. Is 1200kcals/day too little? (I should eat around 2000kcals a day).
<bot>: I'm losing weight to fast and I don't know how to stop it. I'm eating 1200kcals/day. Should I do less sport?