Thanks for your query, I have gone through your query. The pain and pimple in your gums could be because of the pericoronal flap infection of the gums around the wisdom tooth. Consult a oral physician and get it ruled out. This will affect your fetus. Do not take any medication with out prescription, do not get exposed to radiations. If i am your treating doctor, i would have prescribed amoxicillin 5oomg tid for 3 days and paracetamol 500mg. do saline gargling. After you deliver your baby, you can get a radiograph to decide whether tooth can be saved or removed.