Should I drop Economics?

I’m in y13 so getting towards exams. I take economics, maths, further and also physics. I love doing 3 of these subjects a lot but economics for me is becoming a burden which seems to taking a lot of my time. I have offers back for engineering and will need AAA-A*AA. I know I’m so far through the course but I feel like my priority should be to meet my offer. What should I do?