How long does it usually take to get pregnant

I know everyone is different and unpredictable. My husband and I have been trying for over four months and NOTHING . I understand things don’t just happen like that however up to six times a week for four months I’m just worried . Everyone around me makes it seem so easy and I get frustrated because half of them are upset they got pregnant on accident and it’s kinda killing me on the inside like somethings wrong with me