In the current scenario, since you had intimate contact during the fertile period, presuming that you have regular 28-30 day cycles, you have chances of conception. You can go for a blood pregnancy
test at this stage to confirm/exclude pregnancy or wait for your next natural period and take a home pregnancy test 3-7 days later with a fresh early morning sample if you miss it. The spotting could mean an implantation
bleed if you are pregnant. Hope this helps.