Pregnant ?

I had protected sex, and it back fired . The minute my fiancé came, the condom broke. It sat in me for a while until we realized it was broken and I took a plan b 2 days later. My period is late by 8 days, I've been having to urintae almost every 15-20 minutes , I've been super bloated ever since the morning after the condom broke, I even had some weird pain in the are where my tubes would be. My breasts are super sensitive and tender, and I've gained 16 pounds, yet I barely eat ! I took a test but it came out invalid . At this point I don't know if the plan B worked because of these symptoms. What are my chances of being pregnant? I'm not really worried about being pregnant I'm just "chilling " . So I know it's not a mental thing with these symptoms