Sciatica?

Im on my 20th week of pregnancy for my 2nd child Pero Ive been suffering leg pains. parang numb tapos feeling weak. Napakauncomfortable hirap tuloy may focus sa work. Starts from the lower back down through my legs. Usually on my right leg. ??? Sciatica ba tawag dun? thanks. PS. di ko kase naexperience to dun sa panganay ko. ???