HPTs getting faint

I'm 7 weeks 2 days. On Thursday, my nausea suddenly went away. I took an hpt on Friday morning to reduce my anxiety, and it was a lot lighter than my HPTs were when I was still taking them a week a go. I took another one this morning, and it was even lighter. Of course it's Saturday, so my doctor's office isn't open. Is this a big enough worry that I should go to the hospital? Could they do anything for me anyway? I'm not cramping or bleeding at all.