I had a total knee replacement three weeks ago. I have been taking Dilaudid 2mg about every 8 hours now. Also Flexeril 5 mg twice a day. I took them at7:30 this morning. About an hour ago 11:30, I started to get a migraine and I took a Sumatriptan 100 mg prescribed by my primary doctor to take as needed. I didn't think about any drug interactions, but now see that there may be with Flexeril and Sumatriptan. I feel fine. Do I need to sorry about this?