vaginapagina | Bleeding while Pregnant

Alright ladies, I need some words of encouragement. First, I'm 10 weeks pregnant. I haven't seen a doctor yet, but I've been to planned parenthood. My insurance goes through January 1st, so that is when I plan to go to the doctor. So I'm kind of freaking out because I was having spotting the past day or so, then today it got heavier. It's not full period blood, but it is more than spotting. I haven't had any cramps. I've had some bad back pain though, which could just be because I'm pregnant (though this would be the first day for that). The light spotting I assumed was because my husband and I had sex the last two nights, but now I'm not sure since it is more than spotting. I've also been having dizzy spells, and I was nauseous this morning (weird for me, I haven't had a lot of morning sickness at all, and the last time I had it it was a few weeks ago. I switched taking my vitamin from morning to night though, so that is probably why.) Does this sound like it could be a miscarriage? I'm trying not to stress cause it will make things worse but it's proving difficult. Some help? Thoughts?

Edit: As the day drifted on to night, things got worse. The bleeding got heavier, and I started getting cramps. I went to the hospital. Once there, the pain was unbearable. I was in tears it hurt so bad. They did both a regular ultrasound and a vaginal ultrasound, and, unfortunately, I had a miscarriage. :'(