Talk to Gynecologist on Positive Pregnancy Test

My periods were expected by 29th July as last periods were on 1st July and I always get periods 2 days before the last one. I didn't get periods on time and did a strip test on 5th July which was positive, both lines were dark red (the result is attached, the lines appeared immediately after dipping in 3, 4 seconds)

I need to ask if I am pregnant? And should I do the Serum HCG beta test tomorrow, means on 7th July or wait more to get better results?

I have no other symptoms, only mild pain sometimes in the left side of my lower abdomen.