I missed my period on December I took pills I saw it on 4th January till 8th January but I haven't seen it this February the cycle was it becos of the pill?

What kind of pills are you talking about specifically?

Cytotec

This is an abortion drug used to cause a chemical abortion in pregnant women,

Where you sexually active ? Did you test positive for being pregnant ?
This drug is not normally used to control period, so why did you take this drug ?

Cytotec has a long list of side effects and should not be taken unless properly under doctor permission and supervistion
Cytotec Official FDA information, side effects and uses. (http://www.drugs.com/pro/Cytotec.html)

May I ask why you took cytotec? Were you pregnant at that time? This is not a morning after pill, but a very dangerous abortion pill.