no idea what to think... opinions please help!

this past month I have spotted 3 times but no real period. I have taken a pregnancy test it was negative. my period has been irregular since January so I just made an appointment but earliest I can get is on the 24th I never been so confused in my life. has this ever happened to anyone? what was it? should i be worried? my husband and i been trying since October and slowly giving up hope.