DON'T GIVE UP!!
I passed 8th time, aged 34. It's the best thing, hands down, that I've ever done, aside from my kids obviously.
I love, love, love driving about in my car and feeling like the world is my oyster. It's brought me so much pleasure, fun and confidence.
I could have written your post. I felt like although I could drive I couldn't ever pass a test.
It sounds really harsh but I think sometimes loved ones are not the best people to help. My DH used to get very frustrated and cross and I'd feel like shit about it. Ditto where my lovely parents helped and took me for practice tests. What you really need is a professional and, at our age/stage of life, an intensive course works best. I had a week with a completely new instructor (a woman, not sure that that makes a difference but I liked her and felt more comfortable than I had with the FIVE male instructors I'd had previously!), with my test booked in on the final day (Friday) and I passed.
If money's an issue, save up, book an intensive course, and give it another go. Don't listen to anyone but yourself, this is your business, lady.
Also: sucking something or chewing REALLY helps. I had Bach's Rescue Remedy lozenges, sucked them all the way through my test. When you're in the test, just concentrate on getting through the first five minutes. After that it's much easier, you are nearly there.
Keep listening to the Trolls sound track (not giving up today) and GOOD LUCK!