Substitutes for coffee? Or just safe drinks for pregnancy?

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Atm I’m 80% sure I’m pregnant- it’s way too early to test (I think), but I’m experiencing nausea like I did the last time (I miscarried earlier this summer). I’m a coffee drinker, and while I plan on still having a cup of coffee a day on the days I’m working (I work nights), I need something to substitute for the coffees I’m not having. I just found out the ginger lemon tea I like is not safe because it has lemongrass in it. I bought some rooibos (?) tea, but if I don’t like it I don’t know what I’m going to drink! Even in the case I’m not pregnant, I want to eat and drink like I am while ttc. Any suggestions please! I’m generally not a fan of smoothies and don’t like decaf coffee as well.