2 months free

i have been trying for no 2 for 3+years and it was draining!!! with my first ever assisted appointment 4 days away I am back looking for some advice!!we have been diagnosed with secondary infertility and I am hoping for any advice . Is iui worth it or should we go for ivf! I'm due for af in 3 days would my treatment start this month i have all bloods/tests done already or will this all be a long process? thanks for any insight and sorry for the long post !!