At 6w4d pregnant my hcg was 29,164. at 7w1d it had risen to 33,434. is this enough of a rise in 4 days or does this raise concern?

Yes.: Usually HCG will double every 1.4 -2.1 days. At the value you have, the more important question would be what does your ultrasound show? At your gestational age an ultrasound will give better information than blood values.

HCG levels: In early pregnancy the HCG levels should double every 48 hrs. By 7 weeks and a level over 33,000, ultrasound should show a fetal pole with a heartbeat. I would get an ultrasound to know for sure.