Sex

There's a lot of extra blood flow during and after sex, some swelling is completely normal. Honestly some swelling towards the end of pregnancy is normal even without the sex.

totally normal, sooooo much blood flow down there

My DR told me I was having the same symptoms as one going through pre menopause. So extra dry. And then the extra blood flow down there too. So maybe more lube is necessary and make sure that you are getting yours all the way through, not cumming for you will make you swollen too.