Are you still in your first year?
In the first term of first year I found the maths about the same difficulty as A-level just with a little bit extra material thrown in! In the second term it got way harder because they were new concepts I had never even heard of e.g. Convolution theorems, 3D integrals etc.
Second year advanced engineering maths was tough, it wasn't easy understanding probability theories, Laplace transforms, PDEs etc.