Is it a sin to use condoms when having sex? This is what you are asking. Sin is an obstacle or impediment standing in the way of Truth. It comes from inside us as a weakness or temptation, or better yet, as a necessary product for our own growth or consciousness. By all means avoid it, yes, but treat it with gratitude and acceptance.
It seems to me that in this current climate, you will be taking a risk not to use a condom, and by so doing, put not only yourself in jeopardy but others also. When we truly love ourselves, accompanied by verbal and interior prayer, God will grant us the capacity to answer many questions that in the 'good book' may not seem so obvious. Do unto others as you would like done unto yourself.
This is an extremely high law and one very useful to follow. Cause no conscious or intentful harm, and to include yourself also. Loving thoughts.