Last period 4/6/18 average 30 day cycle. on cycleday19-22 spotted pink and brown now have tender nipples and hungry. could it b implantation bleeding?

A person can't tell: Wait. A positive pregnancy test can tell a woman that prior spotting was actually implantation spotting. It can be hard to tell if a woman is pregnant because some of the symptoms seen in early pregnancy can also happen in non-pregnant women. A urine pregnancy test gives a reliable result about 3 weeks after sex (3 weeks after when conception might have occurred), or 1 week after missing a period.