Has this happened to you ??

My pregnancy symptoms stopped last week then kicked back up this week not sure what's going on,I took pregnancy tests and got a positive(twice)a few days ago now yesterday and today got negative my positives were very faint... Not sure if I had a miscarriage, I did have bleeding last week but why the positives so late? And then why did my symptoms stop last week but then kicked back up again ?? What do you ladies think?