Regular spotting or pregnant? Please help?

My periods always been irregular (like it sometimes just skips a month). But I spotted like two weeks ago so I was a bit confused. Iy started out like dark clots and then was like normal period blood, just not a lot of it. Spotting lasted like four days. I'm not on birth control and have never spottedbefore. I had my last period like eight weeks ago but I haven't has any like morning sickness or anything. Iv just felt a little bloated like a normally do before my period. So I was wondering if it was just spotting before a period, or like implantation bleeding bec I heard pms and pregnancy can have similar symptoms.
Regular spotting or pregnant? Please help?
Post Opinion