Husband and I are ttc what could this be?

Ok so my husband and I are ttc and it didnt work Jan because my doc said that it was to close to my period and we didnt have much of a window to get preg. So i had my period the 24th of jan till 27th the day i got off my period we have tried ATLEAST every other day sometimes everyday we also got a ovulation pack did that and tried everytime i was fertil. So the last day that i was fertil was the 7th and as of YESTERDAY 11th i have felt soooooooooo sick at my stomach and i have been pooping more than usual and i have SUPER bad heartburn and my back and sides are KILLING me. I couldnt get to sleep last night so i stayed up and watched a movie and when i went to potty last night when i stoped peeing i started hurting sooooo bad like really really painfull period cramps and i had real light pale pink blood from vag could this be pregnancy? As in my back and sides they dont hurt right now but my belly hurts a lil bit but not AS bad as lasnt night.