Wow I cried reading this. Im 26 have Endo & also was advised that this was my only shot if I wanted to have kids. I have all of the symptoms you have listed. I didnt have any complications with the insertion but did have an exceptional amount of pain. And with a jigh pain threshold its still very painful.
I competely understand that you are crying all the time..thats why Im on here tonight trying to find an answer to why Im falling apart.
Look after yourself and all the best. If I find anything Ill message you and please do the same.