faint lines? please help!

Jennifer
I am due to start my period today and I've had brown discharge since yesterday. My breast are a little sore. I feel like I'm going to be starting my period but I've gotten faint positives on my pregnancy tests I've taken today. So far I've taken 4 with faint positives. We have been trying to conceive for 1&1/2 years with 2 early miscarriages. Do you think these could be false positives due to blood in my urine from my period? I've read that's possible. I don't want to get my hopes up for them to be crushed. Any advise would be so welcomed!