as a Sorcerer, given that I can’t multiclass or take feats, how successful can I be at passing concentration checks starting at level 15 [closed]

I’m doing a melee sorcerer, but I’m afraid of losing my concentration in combat because in the higher levels the damage is too big and the concentration check is too difficult.
My campaign dosen’t allow feats and multiclassing, only ASI.
Is the haste spell worth it at higher levels?

not worth it to cast only to lose it in one round because I was hit and lost concentration – that’s what I mean by "Is it worth it?"

dex- (+2) str- (+2) / int – (0) / wis- (-1) / const (+5)

prof- (+5)