Question about Diversion programs for first time drug offenders...?

So I was caught with less than one gram of marijuana and paraphernalia ( a little pipe ) and arrested for those charges along with minor in consumption. I don't need a speech about how I am naive or "stupid", I am a senior in high school with a 3.9GPA and scholarships for more than $50,000 to three universities. I don't mean to boast, but any time I mention my arrest I get automatically placed under the category of "dumbass". Anyway, I completed a diversion program with flying colors and had no problems and got drug tested during it as well, easily avoiding smoking any marijuana and came up clean. I ended a few weeks ago (4 weeks?) and they told me I was totally done and they did not want to see me again. Anyway last night I got a call from the program and they wanted to ask me questions and since I wasn't available they will call back within the week, and YES I have indulged and smoked a little marijuana since then because it is my senior year and I am being much more cautious about it, but my question is....can they drug test me again after my diversion program has been closed? thank you.