Since about a week after my last menstrual cycle

Since about a week after my last menstrual cycle. I have had a feeling that I was pregnant. I took like five tests and they all show up negative so I started to get very discouraged. Last night as my husband and I are walking through Walmart I tell him about this underrating more than painful cramps in the side of my stomach and he says well let's get another test. I said well I really don't want to because all of the tests have been negative so let's not. So he talked me into it and we got a test and I took it and it showed positive right away. I was in shock. I yelled for my husband. He took a look at the test and the biggest grin came across his face and he said," This is the best Father's Day present I could ever get."