:/ Please help don't kno what to do ;(

I took my test today I am about a week late off my period nd I got a negative :( nd I don't like it cause the last time I was late I went to the doctors nd they pretty much said I was fat in kind of a professional way but I felt hurt so every time I get a negative I feel that way I have gained 20 lbs in a month nd ya so I dunno I wanna loose weight but I'm ttc nd I don't kno a good diet that can go with it