You're not alone! And not in a tiny minority!!!
IVF in a single cycle has a 45% chance of not working even for two healthy under 35 year old's egg and sperm, that's the fact you only realize when you're trying and you start. The odds , of course, only go up with multiple cycles and of course go down with every birthday.
Many people can only afford a few cycles, so never have success, for others even after 10 cycles nothing, or they get luck on their 11th cycle! Its a horrible rut to be stuck in, do you keep on going, spending thousands, the drugs, the waiting , the tests, the hope, or give up. The clinics wont stop you if techincally the next cycle might work, plus they're not going to refuse your money. I think our clinic would have continued if we pushed them until their official cut off for women reaching 46th birthday.
I remember our first cycle, we were so full of hope and then the 2nd, the 3rd, the 4th, the 5th....
I have a beautiful girl now through egg donation, worked first time. My advice would be to have your exit plan, explore other options. For us, after our 5th cycle we thought we'd adopt, its not for some couples. The egg donation was suggested by our clinic and it took a big jump for us to see this as an option. We couldn't even imagine life without her now. We're thinking of a new round for another child.
You have to grieve that as a family, you can't have a baby without IVF, then grieve you can't have a baby with IVF (and own eggs)
There are other options, including the one of letting go of being a mother like my good friend did after 3 cycles with own eggs. There's no best answer, just be very kind to yourself. I wouldn't want to wish my darkest days in IVF on anyone.
There are so many going through what you're going through, I found so much comfort with support online like Fertility Network and Fertility Friends, singles and couples who will understand exactly what you're going through. And counselling is important, only a superwoman could get through multiple cycles with no professional support, and that includes any partner going through it with you. Take care OP. xx