Feeling gutted

I only came off the pill 4 weeks ago and have had all the right symptoms, dizzy, feeling sick, sore breasts etc but I have come on this morning. Did anyone else feel really upset the first time they tried? We have been like Rabbits since I came off the pill. I was adament I could be pregnant and was waiting to take a test in the next few days as I wasn't due on until Sunday this week but it's happened early. Has anyone got any tips?