Some JCs (lower end) allow students to take H2 Maths without A Maths, so make sure you do extremely well for your E maths first. In those JCs, you may still take your H2 Maths + Physics + Chemistry + a H1/2 human/art subject.
dont worry so much, some jcs allow you to takea test for the subject to see if qualify for it even if you dont meet the requirements initially.