I have had no period for 3 weeks now. Done 4 tests all negative. But still no period. Has this happened to anyone ? But it turned out the were pregnant ? Xx

It's possible as some women don't get a positive for several weeks, if not longer. Since it can also be just an off cycle, wait and see what happens when you would expect your next period. If it doesn't who, try another test at that time. Whether it's positive or negative you would want to see your doctor. If positive for starting prenatal care... if negative to determine why you missed two periods in a row.