TTC Baby #2

Currently trying to for baby #2. I have 3 days until my period is supposed to start, but I am having so many pregnant symptoms that I NEVER have when about to start my period. I’m nauseous, extremely bloated, mildly sore boobs, increased appetite, and have been so exhausted lately. I went ahead and took a test using a first response but it came back negative... is it still too early to test or am I just out this month? With my first I tested 2 days before my period and it was a obvious positive and was confirmed as 4 weeks and 4 days. Help please and any advice?