Scared ๐Ÿ˜”๐Ÿ’”

I know I'm probably worrying for no reason
Last month I had sex around July 9th, protected, no holes in the condom, he didn't ejaculate
I got my period when I should've, on the 17th but it was lighter than usual. It lasted five days, was bright red blood, but was just less bleeding. More in the mornings and less toward the afternoons.
Now it's my next cycle and I've been having pains this whole cycle. My next period is due in about 2-3 days and I'm worried it's not going to come even though I haven't had sex this month.
I have PMS symptoms but for some reason I'm still worried about possibly being pregnant from my last time I had sex. I even took a pregnancy test after my light period to make sure, which was 19 dpo and it was a strong and clear negative, no faint lines.
I have an anxiety disorder so maybe that's causing all this worry๐Ÿ˜”
Am I scared for no reason? What should I do to stop worrying?ย 
Please help๐Ÿ˜ข