Am I pregnant? What do you think?

During my last expected ovulation I had a 2 days of spotting and on the 2 night I had sex. It was protected but I am not really sure if the condom stayed on the whole time. My period was supposed to start 5days ago. During the day my period shouldve started, it felt like instead I was ovulation again because my discharge was clear and stretchy like eggwhites for about 3 days. After that it changed back to normal again. Could it be that I am missing a period but not because of pregnancy? (I have missed periods before without having sex during this period) Or is this just a clear sign that I might be pregnant? My intercourse was already 3 weeks ago and I don't have morning sickness. My boobs do feel just a little little bit different than normally but that could come just by overthinking things. What do you think? I could really use some advice. Thanks :)