Hi Alisha,
When I was trying to get pregnant, my fertility doc wanted to start me on fertility meds right away. He thought that I *might* have scar tissues from my abdominal surgery that could be blocking my right fallopian tube. He also wanted me to do an HSG right away too to find out for sure if there was a blockage. I refused it all because I wanted to see if I could get pregnant naturally first. I was way too worried about carrying multiples by going on fertility drugs. I told myself I would try 2-3 natural cycles and then I would do the HSG and go from there. Luckily for me I got pregnant on IUI #2, so I did not need the meds or tests.
But do remember that the statistics are low for each try at IUI. Sometimes it will happen naturally, it just takes awhile.
Good luck!