TMI question - Apologies in advance

Hiya,
So yesterday Morning we dtd....I had a bath etc but was uncomfortable afterwards throughout the day I went to the loo and there was like a pink streak in the discharge. Bump felt very heavy like baby was going to fall out.
Anyway everything eased as the night went on, was find this morning. Until I got to work and I have had the pink streak when I've wiped twice.

Not sure whether this is just because of the friction from dtd or whether my plug has been knocked/dislodged and its the start of my show?

Anyone else had this? x