Mine was full sternal incision, but my "incision" pain, the muscles not the actual incision, lasted almost 5 months. Yep, just recently finally eased off. Still some bone pain when settling in to sleep at night. It kept feeling like someone was trying to pull my chest out through my back with just a hint of twisting for extra fun. Part of each of my breasts is still numb tingly feeling. .... Here's what may be relevant to you, what finally was the turning point in the whole pain journey was when I switched to using Votalen (an NSAID like Naprosyn) instead of Tylenol for pain control. I'm on regular use of Voltaren to deal with chronic plantar Facitis but had not been taking it initially after surgery because of the Coumadin. Once we got the Coumadin stabilized and my PF pain was returning because was getting off the narcotics, I went back to using the Voltaren to control the PF pain. Within a couple of days, I noticed a HUGE change in the level of chest incision discomfort I was having. I suspect the anti-inflammatory aspect was what helped my chest. If allowed, you may want to talk to one of your Dr.s about trying an NSAID for a short while and see if that helps.
Congrats on joining us on the far side of surgery and hope you feel better soon! Linda