Could it be possible that im pregnant??? please help!!?

Okay I've been trying to conceive since Jan. So my period has been kind of messed up since I miscarried last Nov. Im not sure what the length of my cycle is but this month I used a OPK (positive-had sex whole fertile week) and used a ovulation calculator which said my cycle was about 37days long. Haven't missed my period yet but I have been eating like crazy peeing more and has these little bumps around my nipples &if I'm not mistaking light veins. Can I be pregnant???