Is it possible to be pregnant without knowing it?

Last time I saw my bf in person was 6 months ago. Was on the pill and as far as I remember i took it consistently and never fully missed a pill (took it within 24 hours of when I was supposed to as the pack says). We also didnt have any penis/vagina sex. Just oral and other sexy stuff but no ~actual~ heterosexual sex. I’ve been moody af and gained weight but overall I’ve felt kinda depressed and just graduated and my brother is getting married so it’s been stressful. I have not been taking my pill accurately since then, but I haven’t been having sex so it doesn’t really pose any serious consequences. I have, however, been having consistent pill pregnancies since I last saw him. I Can’t currently go to the store to get pregnancy tests and won’t be able to for a few weeks. Is it possible for me to have gone 6 months without knowing I’m pregnant? I know it’s a freaking ridiculous question but I just heard a story of a 17 year old girl who was pregnant and didn’t know she was until she started having contractions. My biggest fear in life is getting pregnant before I can take on a baby. This causes me to get neurotic about the whole thing and go absolutely crazy and focus on nothing else but possibly being pregnant.