In complete and total SHOCK!!!

I took this test this morning on a whim.. I think I should've gotten my period a few days ago but I haven't been very regular lately. Anyhow I did the test and WHAM it came up positive so quickly. I had to look at the lines and the key thingy 20 times. I cannot believe this. So happy!!! We've been trying for a year w male factor infertility. How should I tell my husband?!? Ahhhh!