Lisa,
Your loss is still so recent and you are going through the stages of grief. What you feel is very normal and it's OK. I can only imagine how much harder it is dealing with the kids reactions to your loss. It has been almost five months and I still tear up when talking about it from time to time. Please come here and post as many rambling, venting posts as you need. It is a great outlet because everyone here understands and sometimes you just get tired of hearing the stupid things people say to you in person.
On top of everything else, you have had conflicting Dr. information and your hcg is still pretty high, so it is all the perfec storm for vent/rants/crying episodes. It is enough to send anyone over the edge. I think you are handling it all well.
Kat.