"Phantom" Symptoms

Hi! I need some advice/encouragement/positive vibes. This is my 9th month TTC my second child. I had a major hip surgery in May, which screwed up a lot of stuff, but I've been back at it for the last two months. My Ovia app didn't match this one for the fertile week, so I worked a little harder to account for the difference (haha). I have no real idea when I ovulated because for the first time since I can remember, I never got what I *thought* was ewcm.

Now I'm 8 dpo (according to Glow) with my period due September 4th. I normally have 30 day cycles on average. I have my usual signs: bloating, gassy, nausea. All normal for this time of the month. BUT I have no cramps yet (just a weird sensation in my lower abdomen), my face feels swollen, my boobs haven't deflated like they usually do. and I've been spotting lightly (not even enough to require a liner) since late last night.

From what I've read, implantation can occur between 6 and 12 days past ovulation. Am I going crazy or am I just going to get my period early?