bfp - need someone to talk to

Just got my first bfp after trying to conceive for a couple months. First baby, first time everything..
I'm nervous girls..
What if there's a mistake in the pregnancy test
I've been getting cramps for the last 2-3 days, yesterday was alittle strong and my nipples were also in pain but today my cramps are a little less but boobs don't hurt anymore like yesterday. Isn't this supposed to be a constant feeling?..
What pregnancy test should I buy for accurate results?..
I took a strip..
Two lines means pregnant.
There's two but it's light..
Help :(