Color got called but I dont think im going to go in

I went to the expendables last night (amazing show) and took like three hits, first time smoking in a month. Im on diversion for an MIC and im on a super low frequency, and instead of UAs i do this thing called passpiont and it only tests if youve been on anything 2 days prior. Unfortunaly, my color got called today, but i know if i go in im going to fail and then have to take a UA which would probably come up hot. So i think that i might not go in. Would they just call me and make me go in the next day or would something more sever happen?