TTC after miscarriage

Getting ready to give up feeling like I can never get pregnant again :'( with my first son I got pregnant as soon as I started trying same after got my mirena out & I had a miscarriage which was caused from the mirena now 3 months after my miscarriage trying everytime I'm fertile & nearly everyday still nothing.. It's becoming so disappointing my phone period is due on Monday... I already know it'll show.