U need to go to ur dentist to evaluate the dental pain.It could be something which can wait or it could be something that will get worst,After evaluation the dentist will be able to guide u.If it is something that is simple some scaling polishing can be done cause in pregnancy there is always gum inflammation due to hormonal changes.this can  be and is advisable to be  treated as it is very simple.Now if the problem is more serious like root canal it can only get worst if not treated. Also if ur pregnancy is not complicated it is better to treat now as later pain might Increase and also after the baby ,u will not get time to look after ur teeth which can get neglected .Also during lactation one is feed with a lot of sweets which further worsens the condition. SO ALL IN ALL I would advice u to go see a dentist.and take care.

Now about two weeks are left. If it is bearable get it done post delivery. Till then maintain good oral hygiene