New to Forum.. Breast pain and Lump petrified

Hello my friends x well here I am chatting in a cancer forum... This was probably my worst fear ever! (Other than getting stung by a wasp that is! ) I have put off checking my breasts due to health anxiety and after months of strange muscular aches and pains I asked for a breast exam at the gp and have been referred to the breast clinic.  I am in so much breast pain that I fear I have left it too long.  I have so many other symptoms like nausea  . Breathlessness... loss of appetite...headaches.  I am certain this is bad as I am incredibly poorly.  I am unable to sleep and fear going to sleep at all. I keep having panic attacks and am going insane and I have lost all enjoyment in everything even the good stuff as I get scared and sad.  I even find it difficult to be around my two little boys :0(  x please help.... Desperate x Thinking of all of you x