Make sure you are wearing your compression garment well below your incision line. Wearing it above the incision line can create major swelling and pain in that area. Of course always see your surgeon to make sure nothing else is going on as well. Best of luck!
Although Abdominoplasty will get rid of your excess skin, it may not get rid of the stretch marks, unless they are part of the skin that will be removed in the procedure. There are other alternative procedures for getting rid of the stretch marks.
Congratulations on your surgery! I encourage you to visit with your surgeon for an examination. While the symptoms you mentioned are usually temporary, there is medication that can help you get through this phase. Your surgeon may prescribe muscle relaxers which can help with the muscle...