OK so weird symptoms

OK so I have been 3 weeks late. Then I started spotting and the Dr told me it could be early pregnancy symptoms my first ept test came back negative the second I saw a super faint line so did my husband. But I passed today a small-medium blood clot but not normal for me for my period flow. Idk wth is going on. Is it my period just sporting and coming in light or could I have ovulated twice and got pg to far into getting my period so spotting through it or just not pregnant and having a really weird perod. Oh I have PCOS.