Need advice

Hey girlies! Hoping someone can give some type of advice.

I’ve recently had unprotected sex literally this past Friday and todays Tuesday and I have been spotting on and off for 3 days. Last night while I was on my laptop, I had a dizzy spell so I got up to move around. Felt sleepy yesterday afternoon literally after drinking a matcha latte. I had a period from April 18-22. So I don’t know if it’s me over thinking or if this is implantation bleeding and my last “period” was also implantation bleeding. Any advice before I contact my doctor?

~Thanks