What Causes Delay In Periods, Depression, Sore Breasts And Back Pain?

i get sleepless night and i didnt get my period my last period was jan 2014 and now its feb4 i have a bad back pain lower and i have cramps in night at my sides i cant lie down on my side in the night i get cramps i dont vomite but i feel my food comming up sometimes i eat anything its not a problem i dont get dizzy but i have fever sometimes i feel cold sometimes and i feel hot sometimes its very strange and my breast pain sometimes i feel a heavyness under my breast by upper of my belly i get bad headaces sometimes i have gas i burp alot and yea sleepless night time and yea i had sex with my husband and after that i saw some brown discharge which never happen its being 2 month since we got married i get angry sometimes i get emotional sometimes i dont no plz help