Omg I have this pinched nerve in my lower back had it before I was pregnant but it's bothering me so…

Omg I have this pinched nerve in my lower back had it before I was pregnant but it's bothering me so much more now it's hurts so bad when I walk or try being straight . Comes and goes but now it's coming so frequent ! Should I tell my doctor when I go to my appointment ? & what could they do about that