ok so, i posted a thread earlier and everything before i went on vacation about whether or not i could be pregnant, well i thought i had had a miscarriage. there was dark red blood and really heavy clotting, but now my lower abdomen feels really tight, and i feel like i am seriously bloated and everything, and my pulse rate has increased drastically, i dont know if that has something to do with what might be going on or not. I just want to find out what might be going on with my body, and how to tell my fiance, i am just really scared that i might be pregnant.

Don't necessarily mean that you are pregnant. Have you been taking birth control pills and recently stopped taking them? If so, your body misses those hormones from the pill and has not recognized what exactly is going on yet. So you probably need to go ahead and see a gyno ask for Provera, if your not pregnant, and your cylce will appear normal.