Like everyone here said, go to the hospital. I've been in your situation before where I was pregnant and didn't want to tell my parents. It's scary! But having a miscarriage is a lot worse.
Most parents after the initial shock wears off are very supportive. I love my daughter and there is NO way an unplanned pregnancy would make me feel any different.
You need to see a doctor asap! Maybe you need a rhogham shot or have a blood clot..only doctor can tell you what's wrong with you.at this point theres not much you can do, only bed rest...good luck!
You should really go to the doctor to make sure everything is o.k. I have experienced a miscarriage in the past and this could be a sign of it possibly. I also had some bleeding at the beginning of my current pregnancy which many women do experience. Everything was fine once I went to the doctor and I am currently due in 5 1/2 weeks. It is very important to get prenatal care and always call the doctor when you experience problems.
Just go to the doctor. Bleeding can happen but if it gets bad that's not good.