hi i have a question about d and c

hi, i had a d and c july 28. and bleed lightly through the 1 st part of aug, then i had a full normal period sep 12, and my cycles are 30 days exactly, well this its october now and according to my calender iam 6 days late, i am sexually active and ttc again, i do think i ovulated later then normal not sure when though, i know that push my period off track, i was suppse to start oct 10, but i spotted only when i wiped it was on the toilet paper only, and that was the day before on the 9 then it happened again on the 13 then again on the 15 and nothing today, it wasnt even enough to put a panty liner on, what do you think is going on? do you think it was the d and c? or could i be pregnant? i did test it was a bfn, and do u think its to early to test?