Struggling to conceive after implant removal

Hey, I had my nexplanon implant removed 6 months ago as it had run out and I decided not to carry on with any contraception. Before the implant I was extremely fertile and got pregnant every time I had unprotected sex (1st time miscarriage, 2nd and 3rd full term and 4th was an abortion and had implant put in same day). I have been having regular sex and have had sex over my fertile period every cycle since removal. But I am not falling pregnant. Is this normal? Just looking for some advice/experiences if anyone has any!