Morning sickness before missed period?

So my boyfriend and I were trying for a baby and have been regularly "trying" for a while. Now For the past four days or so, I've been waking up and feel nauseous and throw up on and off. Mainly in the morning is when I throw up and I just feel nauseous most of the day. I was craving Mcds yesterday and it was amazing at first and then halfway through eating it, I started feeling like it was going to come right back up so I stopped eating and was just sick to my stomach for a few more hrs. My cycle isn't supposed to start for almost a week, and I say that because it's been coming earlier and earlier these last few months but I had gone to the dr because the only symptoms I've been having are the nausea and vomitting and I've been super tired all day. Plus my cat won't leave my side. He's been sleeping by my stomach since I started feeling funny. But anyways, I had gone to the dr and even though they did a urine test and it came back neg, he told me it was too early to show on urine and I'd have to go somewhere else to do a blood test because the urgent care didn't do those. Now I haven't been tracking my cycle like I should and I've never had a baby before. I was just wondering if this has happened to anyone else??? I'm hoping for a baby so I pray I'm not crazy.