Suggestions please!

I'm 27 days late on my period. Two weeks ago I took a test and it was negative. But last week when I woke up I spotted but then nothing else for the rest of the day. That same night we had sex and he didn't pull out (no I'm not on birth control) and two nights after that he didn't pull out again. Yesterday morning I took another test and it still days negative. We are trying to have a baby...so it isn't a mistake lol. But could it be it's to soon for the test to detect which I wouldn't think so... Any suggestions?