Should I go see a doctor for a test?

I always had irrigular periods me and my boyfriend have been together for 2 years now I have pcos and we had unprotected on february 13th there was leakage and I had a short period a week later and now I'm late I had a 5 day light period last month none so far this month but I've been having heartburn and feeling really tired and my are slightly sore and the are a little bit darker I took a test last month it said no and I took one this morning same answer should I wait 2 more weeks then go to a doctor and take a prey test ? I have never had these issues before I'm lost and I've been having really weird moods I've been sad then happy then wanting to cry