Are these test accurate?

Ashley • I`m Ashley. I have been with my boyfriend for 4 years.. Have one dog (red nose pit) rebel! And expecting baby #1 May 17
So this is what I took yesterday and I had been thinking was it real? Do dollar test actually work. It came back positive within 3 secs. And BAM. Should I believe it? Or take more? I go to the doc tomorrow but I really don't wanna go and they tell me I'm not prego. Because my be is going with me for the first ever.