My gf had a 3 day period 16 days ago, and we were worried but concluded that everything was ok. However, a few days ago, about 10-14 days following the beginning of her cycle, she had light spottign that lasted a day and she felt like she was going to have a very early period. However, the light bleeding stopped. That is around the time she would expect to ovulate, and we do not know what to think. Could this be implantation bleeding?

--We had sex twice before this bleeding during this cycle. Both times I heard the condom break before I came, and I replaced the condom. Neither time did i cum while inside of her.

Any help would be nice!