I am taking irbesartan 300mg for blood pressure and my doctor put me on amlodapine didn't agree with me could I increase the irbesartan?

Difficult to say. You should discuss specifics of dosage adjustments with your doctor - there are many factors that go into what is the right dosage to try, or if it makes sense to try a higher dose. There are many other options besides amlodapine to consider if you need additional blood pressure control.