Feeling depressed at week 29

Hi fellow mummies, I’m FTM in my 29th week and in the past 2 weeks, I’ve been feeling down, many times I’ll just cry and feel sad and lonely in this journey even though my husband is physically with me. This negativity gets worse at night and I can’t seem to bring myself to do things and I keep feeling there’s nothing to smile about. Being tested positive for covid last week and having to quarantine at home made things worse. Is this normal and any tips on how to get over these hormonal mood swings? Is this a side effect of GD?Thanks.