Yeah, I mean, ancient Egypt had issues-- the big one being sand lice. Of course the water was an issue, various diseases to be sure, and the reason they had dentists before anyone else that we know of is because it was necessary due to sand being in the food all the time. There'd be no sunscreen and I am a guy that tends to burn. They had beer for cleaner drinking water but it was low alcohol and more of a thick mash, but beer nonetheless.
If I could either bring books or memorize formulas I'd work on steel, steam, gunpowder, and paper (they had papyrus but paper would be better). They had copper and it would be a hell of a stretch but electricity might be on the horizon but that's probably a tall order. Stick with steam power. Egypt was a huge cotton and wheat producer, with access to copper mines out in Timna, and if I could also refine better beer we'd have a real economic throw-weight with a bit of portfolio diversity. Plus using Alexandria as the seat of science and philosophy I could get some big brains to buy into my technological reforms.
I'd have to put up with the political jockeying at the time; assuming that Cleo and I are an exclusive item we still would be pressured to pick sides in the Roman civil war. Of course, showing up with a handful of muskets might make the whole thing just a brief nuisance.
