Hello, I Had Sex With My Boyfriend On The 20th

Hello, I had sex with my boyfriend on the 20th and 22nd of July. My period came on the 12th of July, and ended a few days before we did it. We used protection both times, and made sure there was no breakage or tears and there were none. He never ejaculated in me. I was showing all signs of PMS afterwards, and my period came on August 7th but was much lighter than usual, and almost stopping on the second day. Could I be pregnant? My periods are always regular.