Is 7 month sleep regression a thing or just sick?

So my little one has always been the BEST sleeper. She’s been sleeping through the night since about 8 weeks old and she never went through a 4 month sleep regression. She typically sleeps 11 hours at night. Right now she’s sick, double ear infection and congestion. She’s been on antibiotics for 7 days now, so I think her ears are better. Last night and the night before she woke in the middle of the night and would not go back to sleep unless I was holding her, super clingy, would scream if my husband tried. We don’t co-sleep, but I ended up holding her in bed after 3.5 hours of unsuccessfully trying to put her down at 3am this morning. She’s been sick before and didn’t do this. Is this a sleep regression or sickness? Help please!!!! What do I do?! I don’t want to start the co-sleeping habit.