When you need to convey the message that you are short on time, you can use plenty of synonyms for "in a hurry." For instance, you can say that you are in a rush, hustling, pushing, or even tearing down the street. If you're running behind schedule, you might say you're in a race against the clock, or in a time crunch. Alternatively, if you're trying to express the sense of urgency you feel to complete a task, you could say you're under pressure, or that you're swamped. Ultimately, there's no shortage of phrases that you can use to help others understand your sense of urgency.