Don't know what to do

Crystal
So iv been trying to get pregnant for 1 year I took 2 pregnancy test last month an they came out with one dark line an one light line on both of them then I started my period 2 days later ok I knew I wasn't pregnant now I'm gaining weight an want to eat everything an have been super emotional about everything  I started my period this month it lasted for 3 days a couple days before that I would spot after intercourse an now that my period is over I still spot! I'm getting super depressed that I'm not getting pregnant I really don't know what to do