Cold vs Heat

Has anyone found that one or the other doesn’t work for them? I recently have been in a flare up due to a pulmonary embolism which affected my breathing and then a nasty cold hitting me right after. I had tried ice packs to see if they’d help me and I think they’ve actually made me worse. Back to the heating pad I go. If you’re having issues and rotating heat/ice then maybe just using one or the other is better for some of us. Just a thought.