Do I have the flu or just something similar?

Well it's definitely not the flu because with the flu you always have a fever, typically a higher one like 101 or above. It could be a cold, or even just alleries. Spring is coming, and you may be developing new allergies, or just some of your old allergy symptoms could be coming back. I think you probably have a cold, but if it doesn't clear up soon you should go to your doctor to ask him about allergies. I hope you feel better soon!