...Could this be implantation bleeding???

I just joined the glow community yesterday ttc for the first time with hubby since December 2019...I haven’t been tracking my cycles until I downloaded this app. Let me say this:

I had my period 5 days starting March 25...just today I had really bad cramps about an hour ago and just checked my undies and now theres dark brown spotting like I would have the days leading up to my AF...After seeing all the positivity here you guys have me thinking something’s up?? Not enough to calculate ovulation etc but who’s had this happen and ended up preggers? Could this be implantation bleeding??? My husband and I have had intercourse every other day after AF ended.