False negative ?

Anyone take a pregnancy test and get a negative, then you take it again and get a positive ? It’s 2 days before my period is set to come but I’m having and have been having the same symptoms I had with my 7 month old. I’m very in tune with my body and I feel like I am 100 percent pregnant... BUT the test was negative and I have 2 days until my period is supposed to come. Now I’m feeling crazy. Has anyone ever gotten a negative then positive ?