If im pregnant.. how far am i along?

To

Period history..

Feb 13th

March 13th

April 13th

May 16th

Theyre the dates of my last 4 periods.

I had sex unprotected on May 26th and May 30th.

I tested today and got this .. im still not sure its positive ... but if it is should it be so light according to my dates? And how far would i be?