so I'm on birth control & always use condoms when I have sex. But Ive missed my past two periods which has happened before while on this birth control, but I'm freakin out. The last time I had sex was November 2 (5 weeks ago) & since then I've taken 2 pregnancy tests. I took one 2 weeks ago & it was negative, but I feel like I've gained weight & I've been super tired & just haven't felt right so I took another test this past Saturday & it was negative too. But I'm still worried & feel weird & idk what to do:( should I know by now if I'm pregnant?