In the current scenario, you should get a home pregnancy
test with a fresh early morning sample of urine and if pregnancy is confirmed, see a specialist for further management. If pregnant, it is likely that you may have had implantation
bleeding and if negative, some breakthrough bleed. Either way, a clinical evaluation and a trans-vaginal sonogram are helpful to plan further management. Please abstain from sexual intercourse until things get clarified since you could also be having a threatened abortion
if you are pregnant and in such a case, absolute rest is mandatory until symptoms cease. Hope this helps.