Unusual Spotting..

Trista • Trista 🙃
Ladies, I know none of you will be able to tell me what's going on but just to reach out, I'd like to know if anyone has ever been in this situation.. 
I know by this app that I just ovulated yesterday but now I'm spotting, like about 4-5 times in my underwear. I didn't just have sex before it started or anything- I get that if it's rough- just had dinner and am bloated but noticed spotting. 
I am not on birth control, we use condoms. We did have sex during my green days (fertile days) and we only use the condom right before he comes so that he doesn't come inside me. He doesn't like to pull out so for the 2 minutes at the end we use the rubber. 
I'm an average sized girl; 5'3 116 lbs. 28 yrs old. I have a little boy - he's 5. 
I don't know if I'm forgetting anything but has anyone experienced this? Would love to hear what you girls think it might be or if I'm just jumping to the worst conclusion...... ((Implantation blood))