I’m freaking out!! Please help!

Ok so I should be about 4 weeks 4 days and I’m honestly freaking out! I have been “spotting” (pink and sometimes a little bit of red when wiping) for the past 3 or 4 days. I took 2 pregnancy tests on the 8th and they were positive but when I tested 2 days later it was negative? I have almost no symptoms other than sneezing more and blocked nose, occasional nausea, slight headaches, bloating and constipation, I am not able to test right now or go to the doctor (on a business trip) any advice or suggestions?