How to hide morning sickness at work?!

9 weeks 2 days and I have to say I feel lucky because I haven’t had it too bad with symptoms. I get waived of nausea throughout the day and when I throw up I immediately feel better. I work in an office setting and within my department/ office area are 7 of us. We have work stations in an open concept room. My supervisor knows I’m pregnant since I told her around 6 weeks when I heard the heartbeat. I wanted her to know due to the frequent doctors appointments. Due to constantly running to the bathroom (that is very far from my office) I feel like they are catching on but I don’t want to tell them until the first trimester ends. Any tips on how to hide this just a few more weeks?!