Hello, and I hope I can help you today. In a normal pregnancy, the HCG value is supposed to double every 48-72 hours. Furthermore, in a normal pregnancy, a HCG level for a 4-5 week pregnancy is in the thousands, not hundreds. So I am very sorry to inform you that is really is not likely you have a normal pregnancy that will ever develop a heartbeat. If you had an ultrasound that confirms this pregnancy is in your uterus (an ectopic or tubal pregnancy can also cause bleeding and inappropriately rising HCG) you already likely already miscarried, meaning that the part of the pregnancy that develops into a fetus has stopped developing or died. The tissue that supports the pregnancy can continue to secrete HCG so your levels may continue to rise until you pass the pregnancy completely or have treatment by your doctor (medical or surgical) to remove the remainder of the pregnancy. Unfortunately, one in ten pregnancies will end in miscarriage (this increases to one in seven if you are over 35 years old and one in five if you re over 40). There is nothing that can be done to prevent a miscarriage if the pregnancy is not developing normally, so bedrest and/or medications will not help you and will just likely prolong the period of time it would take for your body to pass the rest of the pregnancy. 99 percent of miscarriages are due to genetic abnormalities, and having it die or not develop at an early gestation is nature s way of not having a very abnormal fetus continue to develop. So I am so sorry to give you sad news, but I asssure you if this is a miscarriage you have a greater than 90% chance of having a successful pregnancy if you are under the age of 35, and even in older women, it is most likely your next pregnancy will develop successfully. I hope I was able to adequately answer your question today and that my advice was helpful. Best wishes and take care, Dr. Brown