Am I pregnant??? My period came around the time it was due but it was really watery, and only?

... lasted 2 days then just spotting. Also I can't stand food or even thinking, smelling and look of it? I've been vomiting. Dizziness? Bit of diarrhoea ? Cramps? So so tired

Not on birth control. Withdrawal method. Could it possible have been implantation?