Problems during 21th week of pregnency.

I m 21th year pregnant. Suddenly last two days in the morning time( 8-10 )am i m ferlling very weakness and ringling in both hands and legs alongwith  eye darkness .  During this two days i feeling the baby movement is excess. When nonstopping the continue movement  of baby  from two days , i consulted the trating Gyano and she said it is good sign than the baby momenting. But when i returned from doctor i have taking 04 peace sweet and i feel some energetic alongwith normal movement of baby upto 02 hours. It is to also inform that i have already taking juice, sake, coconut water, and green veg, milk etc as healthy diet. However, pl advice that what is the reason for same problem. After searching some website on google i gesses what it it is Hypoglycemia ? If yes, than pl advise the some medicine alongwith suitable diet than i can managed the same problem ASAP. Pl also advice for this type of problem any risk for baby ?