I am 20 and have been pregnant twice. I have had 1 son and 1 miscarriage. I didn't know I was pregnant with my son until I was 4 weeks along. I didn't know I was pregnant with my miscarriage until I was 9 weeks along. My last period was May 23, 2012. I had very light and short bleeding on June 17, 2012. Exactly 10 days after ovulation which makes me think implantation bleeding. Since then I have been extremely bloated with no weight gain. Nauseous with no throwing up. Very lightheaded with migranes. I also have been very moody and picking fights with my husband just like I did with my 1st and 2nd pregnancy. I have taken numerous pregnancy tests and they have all came back negative. My husband and I really want to be pregnant! But I don't want to get my hopes up. What do you all think? Does it seem like I could be pregnant? Or do you think something else is going on? Thanks for all your help!