Am I pregnant? please respond!

Hey all, I am 20 years old and my husband and i have been trying to have a baby for about 4 months. Lately i have been feeling like i am pregnant, but a few days ago i started my period, a week or so early. It isnt as heavy, and i feel very dizzy when i am standing up, and my breasts are very sore, which usually doesnt happen to me even when i am menstruating. I took a PG test but i got a very very faint neg. result, but i could almost see another line making it pos. both lines were very faint. Also i feel hungry all the time but nothing ever sounds good. I dont know what to think, i hear so many different things about getting your period while your pregnant, is it possible that im pregnant and tested too early?? Please help me.