I am still blocked up after a cold. and now having some toothache in a top molar, but only when walking or moving. is it related to blocked sinuses?

Could be: Or it could also be a damaged (cavity, fracture) tooth. There's only a 2 cell thick membrane between the end of the root of an upper molar and the inside of the maxillary sinus. Put your head between your knees...If it gets worse is probably sinus. Should get better as sinus begins to drain. If not, see your dentist.

Most likely : Only if the symptoms occurred at the same time as the stuffed nose. If the tooth was sensitive before the sinus problem then they may not be related.

Possibly: Tooth and sinus pain can be directly related. The anatomical position of the upper posterior teeth frequently abut the sinus. This causes inflammation in the sinus to be felt in the teeth and visa versa. A visit to the dentist can help identify the cause of the problem if it is dental. If no dental problem found see your md for further care of your sinus. Good luck.

Possibly: Sinus inflammation is often the culprit regarding maxillary toothaches, especially if the pain started with your congestion. If the pain does not resolve after your cold clears up, see your dentist.

Yes: Yes, likely. Treat sinus infection. If painful tooth persists, see dentist.