Positive?

I am 4 days late. Bought two doller store tests. Took one Saturday (2 days late).negative. Took one this morning (Monday). read negative at 3 min but about an hour later I looked and it was two very distinct lines....is this evap or might I be pregnant????? we have been ttc for almost 2 years and are in our 30s so pretty excited but trying not to be lol