True, some women feel mild cramping or breast tenderness just a week before their period is due. But the only sure way to know is a home test after your period is missed.
Early signs like nausea, metallic taste in the mouth, or sore breasts can start within 3-4 weeks. But honestly, these can feel exactly like normal PMS symptoms. The best way is to keep track of your dates and test once you are late.
Oh, I used to overanalyze every single twinge in my stomach and Google symptoms day and night! I felt so tired and moody even before my period was due, but looking back, the anxiety was just making it worse. Try to distract yourself until the missed period date.
Don't waste money buying multiple pregnancy test kits too early because they will just show negative before a month! Wait for your missed period, then do one proper test. It's much cheaper and saves you from unnecessary stress.
Sometimes you might feel slight spotting (implantation bleeding) or feel unusually tired and bloated even before your missed period. But please don't stress over every small symptom; just wait patiently for your missed date and do a test.