hello,
you said you have partial
root canal in march,still not completed because of infection........
but you did not tell that is this infection is persisting since march?????????
you told that you have red and
swollen gums and an ulcer over that area which is an indication of
sinus formation in that area.....
but please do not get worried for sinus formation,it will help in
drainage,and you will get relief after this........
but since march it is such a long time for infection,so please go for proper antibiotic course and complete your root canal sittings.......
for your
migraine pain according to me it may be normal but please get your physician advise........
one more thing get the complete oral examination done.....
this pain on the opposite side may be infection on that side.............
take care
Dr.Gunjan Gupta