ftm help

so today I had went to my 36 weeks 6 day appointment I did get my cervix checked and had the group b testing done. after my appointment I did some shopping and didn't feel right so I went home and looked I had this snot looking stuff in my panties that was around 1. I went back to the bathroom around 3 and had alil on the tissue. Then at 5 had to use the bathroom and had a lot come out and yellowish looking. At 6 I had a lil come out again and then a lot more came out around 7. Has anyone else experienced this? if so when did you go into labor ?