Can heavy bleeding cause?

i do have a total prolapse of all of my female organs due to giving birth to all 3 of my very big babies. i had it already with my first 2 babies, and then had a 3rd baby last May. now it is much worse. the doctor gave me a pessary to wear to help hold everything up, and it seems to be helping some. he also tied my tubes back in May right after my son's birth. since then i have had the worst periods of my life. i am going to be 39 years old in June, and i have never had as hard a time with my periods. one month it's barely even enough to be considered a period, the next it is horrible. i have to double up on pads, and if i do not change them every 2-3 hours i ruin my clothes. i am currently on my 2nd period this month, the 1st was around Feb 2nd, and lasted for maybe 2 days and was so light that a panty liner was all i had to wear. then the night before last i woke up with horrible cramps and noticed i was soaked, i went to the bathroom and i was a mess, and it was just gushing, and it's been like that since. now today i am feeling very light headed and weak. i have lost a lot of blood. the cramping is finally fading thanks to the excedrine that i took, but i am still bleed profusely. i made an appointment with my doctor but they did not seem to think this was bad enough to get me in immediately and made my appointment for March 5th. What i need to know now is can heavy blood lose like this cause me to be light headed and weak. i am here alone with my 2 little boys. my daughter is spending the weekend 2 states away with her dad so she is not here to help me, and my husband has to work all weekend. i am a little worried about being here alone with my boys. should i be concerned that i have lost so much blood and am continuing to lose it, and that i am feeling this way? what can i do to help the way that i am feeling?