If you have your heart set on Edinburgh, then maybe dropping Textiles is a better option. However, it's important that you enjoy your subjects else you won't do as well- and it's the grades that count the most.
For example, some people double take when I say I do Politics, Classics and English for A2 and have all my offers for Psychology (Cardiff, St. Andrews, Glasgow, Sussex, Warwick). I know a girl who got an offer from Cardiff with Drama, English and Textiles. Just make sure you check out the universities entry requirements pages! Good luck x