confused

so I'm very regular and I missed my period by 2 days so I took a test yesterday it came out positive! later on in the day I had some spotting/bleeding..lighter than my period...this morning I did a test it's negative...i still have the spotting/bleeding...its not enough to be my period but from what I read I feel like It could be more than spotting...not sure...im Seeing my doctor Monday ..has it happen to anyone and had a healthy pregnancy??