Pregnant or period?

Hi all. I'm new to all this so I need your advice (& forgive me if i give TMI) lol.

My husband and I have been TTC for only a few months now. We had sex a few times during my firtile window. I had all the pregnancy symptoms (very sore swollen breasts, pee a lot, heartburn, gas, etc.) but then yesterday I got my period, 3 days early. Normally it lasts 5-6 days, the first 3 being very heavy. Yesterday was heavy enough that I used a tampon & a pad (which I normally do just in case anything slips by). Today, only day 2, it's super light that I'm only using a light days tampon & my pad is clean. That's not normal for me.

So my question is, could I be preggers & still have had a heavy flow yesterday or is it just a light period & be grateful is not a killer one this month? Lol

Thanks in advance for any advice or insight anyone can give!