Evap? Or pregnant???

I am 3 months pp. Had unprotected sex one in the heat of the moment. My milk supply has been dropping and I have been super moody and crampy so I took a test.

The test is NOT within the time frame when the picture was taken. I peed on the test and went to clean up dinner dishes and forgot about it. Went back and looked and there is clearly a second line but I dont know what to make of it. I am fairly panic struck. Going to test in the am

Thanks. Please don't judge me. ☹