Side tat swelling

I sat for an eight hour session for a side tattoo four days ago and yesterday I noticed I had noticeable swelling in my lower abdomen on the right side below where the tattoo was done. The tattoo goes up my rib cage to my breast and then comes down to just below the hip. Its the largest tattoo I've ever had done and I have never had swelling before. I have no other symptoms that would indicate infection. The tattoo has scabbed and is itchy at this point. I am continuing to follow the aftercare but looking down at my abdomen/lower portion of my body its not exactly comforting to see just one side swollen. Any advice is appreciated.

OMG finally I found someone that experienced the same thing as I am. I got a huge tat from right below my boob, down my ribcage and over my hipbone and now the area below it is swollen.No pain, redness or anything like that..just the swelling. What happened?? Did the swelling go down? Please let me know what to expect next!