Abdominal Pain and Bloating post IVF Transfer

I am in the two week waiting period. (6 dpt) This is the 3rd IVF transfer for us (2 cycles - 3 transfers - 0 pos). The quality of my eggs wasn't great - but we ended up with 3 8-cell embryos for a day-3 transfer. The waiting is so hard and I am constantly reading everything I can find looking for 'clues'. I do have a question for everyone out there though.. I was very sore this time after my retrieval. Since about 3dpt, my stomach has been very bloated and hard. I actually think it might be caused by over-stimulation of my ovaries as opposed to any sort of pregnancy symptom. Has anyone else experienced this after their transfer? My pain is almost gone - and so I don't think it's anything serious.