FtM is this my mucus plug? TMI

Im 36 weeks 4 days. I wiped around 1 pm and had slight pink discharge and then this happened at 5pm. It's 10pm and nothing so far.

I have a dr appointment on tuesday (in 4 days). Should I wait till then? I'm staying over my MiL house and she says to wait till something happens so I have no clue what to do. I'm nervous and scared because my s/o is in vegas and won't be back till the dr appointment. I think I made a previous post but my MiL is very nonchalant about it and I kind of trust her since she had 5 kids but idk.

For those who had kids how long after your bloody show did you give birth?