last period was aug 24-29 had unprotected sex (not on birth control) sept 6/7 using pull out method (no idea when i ovulated) & a few days later had 2 days of spotting , its now cd 30 (my cycles never last this long) & im 5 days late as to glow & ovia.. i took 2 frer test last nite & they were faint positives, now today though i took 2 more frer both were negative .. what could be going on? they had color in person