I been trying to get pregnant for over a year, but I do get my period every 20 days, can I still get pregnant even if I get my period every 20 days?

As long as ovulate. As long as you ovulate, you can get pregnant. Although, 20 days sounds somewhat short for a normal cycle, if you have ovulation mid cycle, you can get pregnant. Use an over-the-counter ovulation test to check for it and then you can have a definite answer.