If i had a miscarraige, can that make it harder for me to get pregnant again? it hasnt happened in almost 2 years. no protection used.

Shouldn't, but...: Having one miscarriage is not a cause of infertility. There are some tests that can be done to evaluate for possible causes, but a lot of the time, for patients struggling with infertility, an exact cause cannot be identified. If you have been trying for 2 years without conceiving, i definitely suggest that you see a doctor for evaluation and treatment.