Feeling Desperate....😢😢

So today marks 1 yr since i removed my IUD (birth control mirena) we have been TTC but no luck yet is it normal for it to take this long to get pregnant?? Im so desperate and sometimes my fiance blames me for not being able to get pregnant and sais its my fault for using birth control for 5 yrs and it now made it hard for us to conceive.... He is still supportive about TTC but it does get to him month after month when i get my period and still no baby....😢😢 Any advice or experiences with mirena or ttc....please help we are desperate....