Dr wants us to use contraceptive

The fertility clinic says I have to get a booster shot for the chicken pox and I absolutely have to wait a month before attempting pregnancy. I figured that just meant we had to wait before starting IVF, which I was fine with because I am dreading it and was glad to have this one more month to try on our own but they told me today we have to use condoms! I can't even imagine using protection and wasting a month like that! I'm not doing it. We haven't gotten pregnant and we've been doing the BD for 13 months. I think odds are against a pregnancy anyway. So frustrated and pissed off right now that we are even on this road. Getting pregnant was not supposed to be this difficult!