I agree that comment was inconsiderate, so I don't think you're over reacting. They obviously don't understand and you shouldn't have to validate in detail your reason for taking off work. When I had the bad anxiety, sometimes it would make me nausiated. This tip may be small, but there's an acupressure point right on your inner wrist, that's good for nausea - they even have these acupressure wrist bands for pregnant women who don't want to take morning sickness meds. You can press on your inner wrists with your thumb. Good luck with getting pregnant.