Foot pain and miss class

I feel both left and right foot pain, but differently. The left foot might be planter fasciitis , the right is tendon. I don't know if I need to see doctor and what doctor I shall I go to see.
I googled for foot pain and found a very informative website, collrunning.
I decide to rest from running today and went to gym. I did some weight training for lower body. Leg press (95lb, 100lb, 105lb, 95lb, 15 repeats), reversed leg curl(30lb 35lb 30lb 30lb 12repeats), leg extension(40lb 40lb 40lb 12+15+12 repeats), calf raise (60lb 70lb 60lb 12 repeats), leg abduction (60lb 70lb 60lb 12repeats) and adduction(60lb 60lb 60lb 12repeats). I also did 20 minutes rowing and 20 minutes stationary bike for cardio. I feel good after exercise.