I have been feeling extremely anxious, short tempered and battling to sleep.

? counseling: Your emotional status needs stabilization. Could benefit from a cognitive-behavioral counseling therapist, as this would allow you to confront many of the issues impacting your life.

GP: Start with your GP for a detailed history and exam in trying to rule out medical causes. Based on findings your doc will be able to further coordinate counseling and tests/treatment as needed.