Pregnancy over 40

Im 45, I've been TTC for the last 3 years, I had a miscarriage 4 years ago due to fibroids which I then had a myomectomy. After various scans and blood tests the doctors have said that I should have no problems getting pregnant. But I haven't. My partner has also gone for tests which came out fine. It's come to a point now that I feel so despondent, I want to try <a href="https://glowing.com/glow-fertility-program">IVF</a> but feel that the doctors willl think that I'm too old. My mind is consumed with getting pregnant and I don't know what I'm doing wrong. Is it too late for me now?