How Do I Get Over Being So Depressed?

Im A Teen And My Dog Roxy (Welsh Corgi) Just Died I Took Her For A Walk And She Drank Some Water From Blue Lake That Water Had A Bloom Of Toxic Allege That I Wasn't Aware Of She Started Falling Over Becoming Paralyzed I Picked Her Up And Ran Home We Got In The Car To The Vets But We Were To Late... I Miss Her So Much I Cant Get Over This Feeling Its Hard For Me To Smile To Feel Like Me Again. I Cry Everyday. Somebody Please Help I Feel Like I've Been Punched In The Heart.