Fertility - not ovulating

I have irregular cycles. I don't know when I'm due, how long and I've been taking ovulation tests every single day for years and they are ALWAYS negative. I have had fertility tests done and nothing shown up.... has anyone else experienced this??

Would the GP give an overweight person something to correct this it's been 11 years of trying for a child and I'm sick of seeing all my friends get pregnant with kids they haven't tried for or want !! 🤬 when will it ever happen for me I'm tired of trying !!!!!!