Scared to take a test!

I can't exactly recal when my last period was but I want to say it was August 3rd, it's now mid September and no period. I haven't taken a test yet but could it all be in my head? To me my stomach looks bigger, i have been peeing SO much lately, I'm very tired, I get hot flashes, boyfriend thinks I'm more emotional, BUT I quit taking my BC because I'm going to be switching to a different form of BC at my yearly check up which is next week sometime and I'm not all that consistent with my regular daily medicine like my anxiety medicine and other vitamin type pills that I take. So, is it in my head or should I take a test or skip it all and go right to the DR??