I had a miscarage a year ago and since then I've been :( trying to get pregnant but it hasn't happened. I'm afraid I'm not able to get pregnant, what could be wrong?

i had a miscarage a year ago and since then ive been :( trying to get pregnant but it hasnt happend. im afraid im not able to get pregnant, what could be wrong?
What

There may not be anything wrong... sometimes it just takes awhile. Frustrating to be sure, I know. Have you done the usual of trying to know when you are most likely fertile? Regular cycles? If it's been over a year, you may want to speak to your doctor. They may offer some initial testing, but they may also suggest trying a bit longer first as it can take some couples a year or more to become pregnant even when everything is fine.