I think I may have just replied to you in the Anglia Ruskin thread but anywho!
I also did Biology and Physics AS and am still doing them both at A2. Since starting A-levels I have found Physics really hard because I don't do Maths. At AS, only myself + 3 other students did Physics without Maths. We all got Ds and Es at the end of AS. The 3 other girls dropped Physics. But I had to carry it on because you need 2 sciences for Optometry.
So yeah. At the end of AS I got a D in Physics. Was obviously devastated because I didn't think I'd get one single uni offer. But I made sure I wrote a cracking personal statement and did 2-3 weeks work experience to help compensate. I ended up getting 3 offers and 1 interview for Optometry.
My predicted grades for AS were ABAC (Psych, Bio, English Lit, Physics).
At the end of AS as a whole I got AABD (Psych, Bio, English Lit, Physics). I dropped English Lit and am predicted A*AB (Psych, Bio, Physics) by the end of A2.
Since getting the D I have worked my bum off and re-sat last summer's Physics paper. After the re-sit I went from a low-E to getting 2 UMS off an A
If you work hard, you'll get what you deserve