No, you shall pass! . . . but it will take some effort!
Let’s be honest, Higher Maths is challenging! Unless you’ve been blessed with crazy Math skills you’ll have to work hard to be successful in this course.
But although it’s challenging, a small amount of regular effort can go a long way to making success much more likely! That’s because there’s quite a lot of cross-over in the topics, so improving in one area can ripple through others. For example, the better you are with trig exact values the easier trig equations become . . . or the more skill you have working with functions the easier differentiation is.
So don’t give up! I’ve seen many students dramatically improve and achieve high marks when all seemed lost . . . but it does require practice and persistence.