Question. .Maybe TMI?

My last period was five days late. it was VERY strange. Usually my cycle is like clockwork, However last month it was completely different. it lasted only 3 days (very little flow) and was a light pink. Today I starting burning dwn there and have gotten alot of clear discharge (looks like watery CM).Is it possible im pregnant? Should I take a test? Also I took some AZO standard, could that give me a false result? TIA :)