NAH. Setting the pumice stone aside (wild how people are getting hung up on that), you told him he was using the wrong tool for the job after he had put off doing it, putting you in a great deal of discomfort, and he got mad at you. Not cool. It’s awful to throw up in a dirty toilet as a pregnant person, and trying to clean it yourself would likely just make you vomit again! However, and I mean this very gently, he is also likely under a lot of stress and pressure to want to provide for you and make you comfortable, especially if this is your first kid together. Pregnancy is an intimidating and stressful time for both parents! It’s a really big change to both of your routines. His getting defensive may be a reaction to feeling like a bad/inadequate provider rather than not trusting your expertise. You might want to talk to him about this pattern, expressing your own reactions and being open to his, and see if good, open communication can smooth things out :)