Feeling disappointed in myself.

I'm 34+6 and I called into work today because I got maybe 1 or 2 hours of sleep last night. Around 3am I started having cramps that felt like I was starting my period (it takes me forever to fall asleep and I wake up a million times to use the bathroom, and the constant fireworks all night didn't help). I never fell back asleep after 3 am. With a 45 minute drive to work I felt it was not safe for me to go in, plus the cramps haven't stopped and I've thrown up once from it. I've also been lightheaded and have had chills while my head feels like it is on fire (no fever though) since last Tuesday and have had diarrhea (all day) the past 5 days. I had a traumatic experience driving home Monday after work which has stressed me out to the max and am wondering if that is part of the reason for not being able to sleep. I just feel so disappointed in myself and like I'm letting everyone at work down, as well as my husband. I'm probably oversharing, but I just feel like a failure. This is my first pregnancy, and it has been hard from the start. I can't wait for August, so I can meet my princess and hopefully start feeling better. Some uplifting comments would be much appreciated as I feel like I'm the only one riding the struggle bus sometimes, and it is so hard to feel so alone.