I am supposed to be around 5 weeks and 4 days pregnant my last menstrual period was June 28th. My HCG was only at 300 two days ago but I have gotten two tests done before this last one and the first time the levels tripled and the second time they doubled. I started having some spotting two days ago, its not much but there were about 2 times that i could of used a panty liner, but now its pretty much gone. Could this be implantation bleeding or is there something most likely wrong with my pregnancy since my levels are doubling but are still very low?