Pregnant with the Mirena IUD

After doing a lot of research myself I couldn't find much information on what to do if u found out you were pregnant with the IUD still in. I was wondering if anyone has had the same symptons. I went to the doctor because around Christmas I was having sever cramping so I wanted to get it taken out. I had my normal exam and then my OB did an ultrasound and we were both shocked to find out I was Prego. I was very upset and had to go home to think about what I wanted to do. I wasn't expecting to have 3 kids and the IUD worked for 3 1/2 yrs so why not now? I knew I couldn't get an abortion so I called my OB back to make an appointment to have it taken out. I knew there were risk either way of losing it so I wanted to do it early rather than something happening later. Well she couldn't get it out cause the strings were wrapped around the IUD so I had no choice but to leave it in. I am now 34 weeks along with it still in place. I have had the hardest pregnancy this time and have been very sick. I have sever migraines that I am taking prescription meds. and it still doesn't help. Sever back pain as well. I only have 3 weeks until she induces me but I pray I will go before that! I do have to say that this lil girl was sent here from above for reasons I don't know yet. I can't wait to meet her and be a family of 5....Yikes!! If anyone has experienced this please let me know how labor & everything went. I had normal deliveries with my other 2 children!