As someone who loves physics but finds it an uphill climb, I strongly urge to not to do physics if you don’t enjoy it. It’s a tough subject and gets way way harder as you go along, and since it seems you’re more interested in economics careers, the maths and further maths will serve you just fine, you are better off doing a subject you really enjoy. Why not an essay subject to balance the extra maths? My friend does English lit, economics maths and further and loves it because she really enjoys English. A language could also be really advantageous.