Iui-consecutive months?

We just started our iui journey last month. I had a HSG test in February and it came back clear, skipped a month and did iui, it failed, I was under a ton of stress so I didn’t think that helped.

My question: I’m due for my next iui next Tuesday and I’m wondering if it is suggested to have them months consecutively or if it is possible and won’t affect the chances if we waited a month? I’m a teacher and that is our state testing week so I can’t be gone.

I haven’t seen much of every other month or consecutive months so I was just reaching out! :)

Thanks loves!