Home Pregnancy test

So, I am very anxious. My period is over a month late. I took 2 pregnancy tests today, because I have had some syptoms. Smells, nausea, dizziness, and boy am I tired. I ended up with one positive and one negative clear blue test. They were not the digital ones. One has a light positive line, but it is there. Has anyone had a false positive before? I can't get into the doctor since it's the weekend, and I am going nuts! My uterus feels so tight too! Like like cramping, but an overwhelming tightness. I figured chatting would help. Thanks.