Office Gift Xchange

So, there are only three employee s in my office counting myself and my boss. Despite the fact that my boss is usually very cold and demeaning she did give me and my coworker gift cards to get out nails done. My coworker gave us both a small gift bag and me...well I didn't give anything. I had no plans to do so. Should I feel bad? Should I feel obligated? I'm debating bringing in see home made goodies after the holiday but gift giving has just left me feeling awkward. What about your office this year?