Could this be implantation bleeding??🤔🤷🏼‍♀️❓❓❓

I'm wondering what this is am I about to start or could this be implantation bleeding? I haven't started yet and my last period was June 27! And I'm exhausted, sore nipples, moody, really nauseous, more uncomfortable than normal and I've been having bad acid reflux and heartburn for a few weeks now! I have taken 4 tests at home and they've all had faint lines; but when I was put in the hospital their test said negative so I'm not sure what's going on I'm confused!! Any advice I'd gladly appreciate! Thanks and God Bless!!