Cam, you should be proud of those grades. Maths and Physics are notoriously hard at A level. I got a U in Maths AS and dropped it after the first year. I then only got an E in Physics overall.
Keep up the hard work, try harder, it really is worth it. I'm sure you've had enough people tell you this before! I regret not trying harder! By the looks of things you should be able to land yourself a good uni place if that is what you chose to do! If not, as Finius said, you can still achieve exactly what you want in life. You just have to prove on your CV and in interviews that you have the skills needed and back these up with examples from what you've done in life. Now is the time to take part in extra-curricular stuff or develop on an idea which makes you stand out in some way!
In other words, don't be down, you're doing awesome, take the buzz from that and keep going!