Pitiful A level grade in maths are my chances lof good employment lowered?

I just got BBE in my A-levels and the E was in maths, I want to study chem engineering and am afraid when it comes to graduate prospects, i wont be chosen due to the low UCAS points and low ranking university (68th in the UK) I am to attend.

I really need help in terms of what i could do to boost my chances of good employment upon graduation and whether at all i should retake that exam whilst in university for the benefit of my CV? Also, if i wanted work experience whilst in uni would any employer take me seriously?

I'm honestly so upset and need help, i don't want to live a **** life and don't know what to do?