absolutely terrified

My first LO just turned one during the beginning of December and I'm pretty sure I'm late. I haven't been tracking my flow like I should be but I'm pretty sure I should have it by now. My husband and I have started sex without a condom a few times but then a light bulb always goes off and we stop and get one because we aren't ready for a second baby just yet. I took a test Christmas <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> and it said negative but I still haven't gotten my period yet. I'm so scared I might be pregnant again and I don't think I'm mentally ready to go through it again. I just needed a place to put this. I cant talk to my friends or family about it. And my husband keeps telling me that I'm fine and that I'm not. I'm just still panicking.