yelenots, I have the leaflet from my packet in front of me. It warns not to take them if you have ever suffered from High BP, it says to stop taking them if you experience "high or low BP or fluid retention eg swollen ankles". So, I infer from this that yes, it COULD be something to do with the Ibuprofen as it's one side-effect - but as you are seeing the doc tomorrow, don't forget to mention this.
Sqad will have a better answer, I'm just reading the current info leaflet which came with mine!