Risks with peppermint tea in first trimester?

So, I have had pretty bad nausea the past 4-5 days and my doctor tried to put me on Zofran, and I said no. An alternative she gave me to help was drinking peppermint tea. But now I've read that can cause miscarriage in high doses? AFTER drinking 4 cups of it today already. Of course now I'm slightly nervous and switched to water, and headed to Glow for opinions and experiences lol.

Have any of you used it safely/with success, and should I consider no longer drinking it as I'm only 5w5d along?