implantation bleeding or WHAT!? HELP

On the 25th of November I was ovulating according to glow and I felt my husband pre cum inside of me. 
We use the pull out method, if we end up conceiving we would be super excited but it's not something we are trying for (Gods timing sort of thing) 
I started bleeding on Dec 8th (a few days early for my AF) but I've been experiencing a little bit of irregularity after trying BC and stopping after one round. Before that my cycle was right on the dot as far as regularity. 
My bleeding is already over (the day AF was supposed to start) and it was super light/ spotting for four days and that's it! Which is highly unusual for me. 
I've also been having some symptoms but I'm not sure if I am just freaking myself out. 
I've had severe indigestion the last two days accompanied by lots of gas (TMI sorry) nausea, bloating, sore breasts, back pain, food aversion (smells 😷) and I've been cramping all four days (highly unusual for me. Normally only cramp the first day and have a very heavy flow).
I know implantation bleeding is rare but could this be it? Very confused and would love anyone's input! 
I can take a test tomorrow morning but would it be too soon!? 
HELP