What to think?!?

Yuliana
My last cycle was 28 days and the previous was  29. This is my first month TTC after I had a miscarriage back in September. I'm having mild cramps since 2 days ago and before that it was a pulling sensation in the right side. Today is cd 29 but no sign of AF. Could I be pregnant? I tested back at 12 dpo but it was negative.