I certainly lost my appetite for about the first 12 weeks but I did have dreadful nausea too. I wasn't actually sick at all but the smells of things would make me retch. My sense of smell became so acute that I turned to my husband one day and said 'i can smell blood.' about a minute later he wiped his nose and he had a nose bleed! He looked at me like I was a vampire!!!

I think most supermarket brand tests are fine and very sensitive. You can get some tests that are extra sensitive for use just before your period is due but i'm not sure statistically how accurate they are.

Good luck!!!