I need your help!

okay this is kind of a complicated story but let me start off by saying: my last period was May 20th-25th and my upcoming period with be June 18th (in 9 days).

So, i’ve been having unprotected sex with this guy for the past month or so, i am not on birth control. and the other week i noticed i had what seems to be a yeast infection. that eventually went away but: last night after having sex i noticed that my uterus/lower abdomen was in some pain (like a 4/10). then, i wiped my vagina and saw a sort of pale reddish pink on the toilet paper.

I’d really like to know your thoughts:

-could i be pregnant?

-is it too early to take a pregnancy test?

-are these std symptoms?

my two major concerns are STD or pregnancy so please leave your thoughts down below.