What is the most likely cause for my symptoms?

I am 25 years old. I have been sick for the last 5-6 years. By sick I mean, tired, sore, cramps, etc. I have suffered from migraines since I was 15 years old. I also get very painful menstral cycles. Well, after I had my son 1.5 years ago, my "female" health has went down hill. Since I take heavy duty meds for both of these issues, I don't feel like I am taken seriously. I had a laproscopy about two months ago. The doctor at that time removed 3 cups worth of blood that had resulted from a ruptured cyst. This is my 4th cyst this year alone. Since the lap though, things are bad. My cramps, which was the reason for the lap, are not any better, worse in fact. My bowels are now being problematic, the ER doc said I probably have IBS. From what I have read, IBS does not just get dramatically worse. Every day, I have to run to the restroom for either debilitating cramps, or severe urgeny to go #2. I'm really scared, and I feel like I am so sick of doctors blowing me off as a drug seeker and not doing their job. My finacee has even been scared due to such a drastic change in my health. He doesn't scare easily. We are concerned I have cancer of some kind. 50-80% of paps don't catch cancer until the end stages. I have two toddlers, I don't want to leave them alone with no mommy. I am freaking out. I can't take this stress of not knowing and no doctor listening to me. I am about to go back to the ER that admitted me for the lap and get re-checked. I don't know what to do. Oh also, at times when my blood has been taken my white counts were low, and I had severe anemia, but it's not always consistant. I have also had several abnormal paps over the years and then a cryo and then nothing further. I am scared beyond belief. Please don't be mean, you don't know me, I just am sick of seeing doctor after doctor with terrible pain, and no relief. I also get fevers, nausea and fatigue regularly. Why won't anyone listen?