pregnant or not

On May 23rd I missed my period and about a week later I had some major breast sensitivity were they were so sore I was basically holding onto them when I walked out of the bedroom in the morning,also had some major nausea. The sore breast subsided but the nausea held on for a few more weeks but no period. I took two pregnancy tests during this time and both were negative.Then on July 4th I saw some blood when I wiped so I thought it was my period but when I went to the bathroom again later there was nothing on the pad and only a slight pink when I wiped. My husband looked it up and that is when I found out about implantation bleeding. Since the 4th I have been bleeding on and off with very little ending up on the pad. But tonight (the 12th) when I when to the bathroom when I wiped there was a brighter red blood on the paper and more of it. I have been on a roller coaster since I missed my period because I want to be pregnant but this blood thing is throwing me for a loop. I want to wait another week before I test again in case it is implantation bleeding and I am testing to early. If it comes out negative again I will have to call the md, but I was hoping for some answers before then.