Possible pregnancy

So I had sex on the day that glow said I was at my highest peek, twice. The same day and once the day after. And about a week ago I started noticing that I was a little more constipated than usual, I had really sore breasts like I can barely touch them without them hurting and they've started to change slightly in color around the nipples, I feel really bloated, and I've had heart burn really bad. All I want to do is sleep. Is it possible that I could be pregnant? I haven't tested yet because I don't want to get my hopes up. Any advice would be great :-)