1,88 lbs is probably a bit on the fast side but not too fast... Your weight loss will slow down automatically the lighter you get. If you feel comfortable with the amount you eat it should be ok.I'm losing close to 1.88 lbs week on avg. I'm getting close to my 180lb goal. Should I start eating more to slow down the weight lost?
Probably eat a bit more and start some heavier resistance training... I think you "real" goal is looking better/living healthier and not reaching a magical number...? Joining a gym will be very helpfull!