Birth Control Issues?

Ok, I know that I had questions before about birth control on here, but I have more issues still. I am going to see my GYN most definitely but in the mean time I wanted some input from anyone that might have had these issues.

I switched birth control after that issue I had last time. They told me that what I was on wasn't strong enough. So now I have been on the new one for a month now ( well a month and one week ).

When I got to the period pills on the last pack I did not get my period.

And for the last 3 wks I have been having terrible cramping and nausea. Total loss of appetie and picky about anything I do eat.

I am on a very strong birth control. I am not sure if this is normal with really strong birth control.

I am not having any bleeding or spotting.

I am wondering wether or not there would be a chance that I am pregnant ( because of me missing my period, and the cramping when I am not spotting or on my period).

Thank you so much !!!!