Am I too far in the pregnancy?

I have been on the pill for about a year. I found out I was pregnant yesterday and the last pregnancy test I did was in January (which came out negative). The problem here I've now learned is that I cannot switch BC brands because it completely ruins the effectiveness of the drug so I could easily have been pregnant in January as well.
I switched to the ring from pills in April and my period came about a week too soon and it was very light. 
For the past month or two my breasts have been very sore and I have had severe cramping which I thought was my period coming but it appears to be an actual baby. I am a bit bloated around the stomach but it is not hard and is only a couple of inches bigger. Also normally I am completely neutral to any kind of bad smell but I cannot even handle perfume since last week.
From this, how far in the pregnancy does it look like I am?
Edit: I am having an ultrasound on Tuesday but I still have three days to go and I am very nervous.