My boyfriend&i are both overweight and i have type2diabetes&my periods are not regular&took the morning after pill can i have high chance of bein preg?

Always a chance: It's difficult to say how high your chance is given that if you're not ovulating it can be more challenging to know when an egg is released. I can't give you an exact number, only can say that it's possible. Taking the morning after pill decreases your risk significantly. Thus it seems you're chances aren't "high" but still possible.