Is it too early for me to take a pregnancy test?

My fiance and i have been trying to pregnant now for quite some time. We tried last month and failed. So we have been trying this month also. We heard from a friend that with drawling from for a few days at a time will increase your chances at getting pregnant. Well this month we had on the 7th (one day after my period ended), again on the 10th, the 13th, the 15th, the 24th and the 28th. I was supposed to start my period on the 28th but i didn't. I am now only 2 days late. I have been feeling nauseous, i dont throw up but from 11am through out the day i feel nauseous. I have been so tired also, i usually dont go to bed until around 11pm and get up at 6am and im completely fine. But now here lately i cant seem to stay awake very long. i have been going to bed at 8:00-9:00 and get up at 6:30 and still feel so tired like i havent gotten any sleep at all. My best friend is now 7 months pregnant, and she said that she experienced no symptoms of pregnancy at all other than a missed period. Other than a missed period, tiredness and nausia are the only symptoms so far. Could i be pregnant? Is is still too early to take a pregnancy test, im only 2 days late on my period?