Traditional and Natural Home Indicators (and Their Limits)
Long before pharmacy kits existed, people relied on folk methods to detect pregnancy. Some are still discussed online, so it helps to know what the evidence actually says.
Natural signs of pregnancy that traditional methods try to track include shifts in basal body temperature (BBT), changes in urine colour or smell, and the texture of cervical mucus. After ovulation, BBT rises slightly and stays elevated if pregnancy occurs. Tracking this over several weeks can suggest you did not ovulate a second time as expected, which may hint at pregnancy, but it cannot confirm it.
Urine colour changes, saltwater or toothpaste urine tests, and similar folk indicators have no clinical evidence behind them. They are unreliable, and acting on them could delay proper testing or care.
The honest answer to "can you tell you are pregnant without a test?" is: you may notice strong clues, but you cannot know for certain. For real certainty, a home pregnancy test kit or a blood test is necessary.