Could I be farther along than I think?

J
Got my BFP on Monday!! Going to the doctor next week. When I took my tests (7/4) I wasn't expecting my period until 7/7 - however my lines showed up immediately and were dark! I took pink and blue dye tests. Not early response tests either.  On my pink dye tests my positive line is even darker than the test line. Its very obviously positive. In June I had a short 3 day period (that was one week late). However when I tested in June I got negatives. But now I'm wondering, do you think I could be further along??!