Pregnancy after m/c?

i had a natural mc (no dnc) 9weeks ago :( it happened on the 23rd may and i recieved my first peiod on the 23rd of june, since then i have been trying like mad, i think i should have been due on y'day but i can sometimes be a few days out. could i poss be prego or would my periods still be pretty messed up and be delayed???