tubal? pregnancy?

I had a tubal done almost 8 years ago. Could I be pregnant? I had a periold for 1/2 a day about 2 weeks ago, should have started my period last week but still nothing as of today. My breasts are huge, not sure just BIG!! I’m so tired and last night got very light headed. I haven’t taken a preg test yet, wasn’t sure if it was worth spending the money on. I’m thinking this is all in my head….but I’m really questioning this today. Help??