Passed out after cervix check???

Lindsay • Enjoying every second of our beautiful baby girl
I'm 39 weeks today and had my cervix checked for the second time (still not dilated😑) and it was sooo much more painful than last time. Right after he took his hand out I felt like I was getting my period or something. I felt like I was going to stand up and see blood all over the exam chair but there was none. Then when I got to the car (my mom drove luckily) I got super light headed and nauseous and couldn't breathe right. Then my vision started to tunnel and I almost passed out. I got my head as far between my legs as possible with this belly and was able to stay conscious. 
I had eaten before and they had just taken my blood pressure are the appointment and it was normal. No idea what happened. 
Anyone else experience anything like this after a dilation check?