Discourse studies and the Covid-19 pandemic have attracted the attention of previous researchers with various topics. However, studies that focus on the anxiety of netizens as expressed through social media Facebook have not been carried out. Therefore, this research is designed to fill the gap in the literature by revealing the forms and linguistic features utilized in representing the anxiety of netizens through the social media Facebook. Qualitative research using a critical discourse analysis approach was conducted on uploads by netizens on Facebook which were published between March and May 2020 and were selected purposively. The collected data is processed by thematic analysis. The results of the study show that netizens' anxiety about the Covid-19 pandemic is manifested in religious expressions, personal reflections, fears and worries, hopes, anger, and advice. The various forms of expression found represent messages of anxiety and efforts to build public awareness to comply with health protocols. The linguistic features used include collective and exclusive pronouns, repetition, metaphor, parallelism, and pragmatic markers of invitations and orders. This linguistic feature functions to foster collectivity, convey feelings, confirm information, and encourage public participation. The research findings provide a new perspective on the study of disaster discourse and expand the area of language studies in a pandemic situation.