Hi there and welcome aboard!!
My advice would be to make sure you are eating enough. I know Phen makes it difficult but eating too little can slow your loss as well. I use Free Diet Plans at SparkPeople to track calories but there are others out there. Try to stay with at least 1,200 a day. Spread them out over 6 small meals.
Other than that, I see you are drinking your water. Are you exercising? Walking is good... (you may have said and I forgot).
I look forward to following your progress!! 
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