Hi and welcome to Healthcaremagic. Thank you for your query. I am Dr. Rommstein, I understand your concerns and I will try to help you as much as I can.
These are not typical symptoms of 
pregnancy nor implantational bleeding.
It is more likely to be spotting due to other causes and most common is a hormone imbalance
.While some causes may be easy to treat, others can indicate a serious underlying condition. Whether you notice spotting or heavier bleeding in between periods, it’s important to see your doctor for testing, diagnosis, and treatment options. Potential other  causes of 
bleeding between periods include a growth in the uterus or cervix, stress, change in medications 
miscarriage, 
vaginal dryness. 
Diagnostic tests should include ovarian 
ultrasound and hormonal measurements which will help  your doctor find the cause of the bleeding. 
I hope I have answered you query. If you have any further questions you can contact us in every time.
Kindly regards. Wish you a good health.