Post partum anxiety is very real. It's post partum depression's not-so-talked-about sister. There is also post partum obsessive compulsive disorder, and post partum psychosis. I have PPA and obsessive compulsive thoughts. It's also a common misconception that post partum mood disorders occur soon after delivery. It can occur as late as 12 months post partum.
Get yourself to your doc as soon as possible. Also talk to a therapist. In the meantime, try to stay as relaxed as possible. Cancel anything that's not important. Clear your schedule. Avoid overbooking, over-stressing, over-doing. Keep it simple. Also, talk to someone. Your mom, your significant other, a friend. Do a Google search and you'll find online support groups too. Get out of the house though, go for a walk, get physical exercise, get some sunshine (vitamin D). Take some time for yourself.
I was also afraid of meds, and really resisted at first. I've been on zoloft for about 9 months now. It took a while to kick in, and I had to have my dose adjusted a couple times, but now I feel great. I also breastfeed, and I'm able to continue breastfeeding, even with the zoloft. It's one of the "safer" anti-depressants/anti-anxiety meds out there. I'll be weaning myself off my meds soon (with my doctor's help, of course). What's important for me, is to get plenty of exercise, get outside (get out of the house!) and to not overbook myself. I have to force myself to take "mental days," days where I just take care of myself. I also have a night out with friends once a month and my husband watches our girls. It helps so much.
Please, seek help. It will only make you stronger. If you need someone to talk to, send me a message. Best of luck to you.