Bfp- now what?

Tested last night and got a bfp. Happy, nervous, scared. :)
  
Hubby and I have been trying for about 6 months but didn't put too much into the last 3 months because we were going on vacation ( scuba diving over Christmas) . The last 10 days have been weird tummy cramps in the morning and really needing to pee when I woke up. Didn't have any other symptoms.
We are both looking at the pregnancy test, shocked,happy but question is... Now what?
Does anyone else think it's strange that you are considered 4 weeks when really it should be 2??