6 weeks pregnant. Nauseaus and fatigued ALL the time?

well i am 13 weeks pregnant and i am still very sleepy most of the time, not all the time, i defiantly find that i need a nap through the day or i start feeling very sick just through sheer tiredness. everyone keeps saying it will get better so im just hoping it does as its playing havoc with my social life. it didnt hit me till i was about 7 weeks though. just relax when you need to though i find fighting it just makes me worse and very moody and sicker feeling.