My period started last week ( Saturday ) and it was light bleeding all this week like when I wiped it was blood but wasn't that much coming out on my underwear. Today I started getting cramping and it was blood coming out when I peed and it was some on my underwear. I noticed my back on the side had hurt. And I'm bleeding now with a little cramps. What could be going on? I had sex 2 weeks ago but PROTECTED (condoms) nothing broke and my boyfriend didn't even cum . So what could be going on . Also to note last month my period was heavy and I had really unbearable cramps so why such a major shift ?