IUI frequency

My RE said average success rates are 3 rounds of IUI. I have done 2 rounds back to back. Both failed & now I'm taking a break because emotionally I just can't take anymore right now. The time out of work, poking & prodding & pumping my body full of hormones-Need a break. Am I making it worse by not doing 3 rounds in a row? Anyone going through IUI & plan on doing 3 in a row?