Bleeding during early pregnancy, is it normal?

I am young, and I am about maybe 3 weeks pregnant. After two weeks of thinking I was, I took a test and it came out a faint positive, I took two more the next day and the following day and they were positive as well and more defined by the third one. So I know I am (plus yesterday morning I took a digital one and it read 'pregnant'). Anyway, I had very little brown and light pink spotting yesterday. I know I shouldn't have (tmi by the way coming up) but my fiance and I had rough last night and I was kind of thinking that this could be why I'm bleeding now. I woke up this morning and I was bleeding a bright red. My period is not "due" for a few weeks and usually when I have it my period is a super heavy flow. Even with a super tampon I leak sometimes. But I have a pad on right now and there is a spot on it but other than that I used up a pantiliner earlier today. But whenever I wipe and whenever I go to the bathroom I see bright red blood still. I can't go to my doctor, I am out of town and the office is closed. Can anyone tell me if this is normal at all? It is my first pregnancy. I do not have any pains at all. My back has been hurting for about two weeks but my doctor said that it is because the pelvis bones are moving in anticipation of birth and they will be all throughout my pregnancy. But like I said, I do not have any pains at all in my abdomen or anything and I still have all the symptoms my doctor said were normal with pregnancy. But I have that recent bright red blood... I am scared and nervous, and I do not have a UTI. If anyone can help me that'd be great of if anyone has experienced this and still had their baby? Idk, thanks for the help though...