Hi,
Sorry to hear how much you are suffering. I know how you feel having been through something similar myself.
Have you tried any mindfulness practices? The one in the link below is a good one. You can do it over a period of eight weeks and there's good evidence to show that it reduces stress and anxiety. The course is free:
palousemindfulness.com/MBSR/week1.html
I also listen to self-hypnosis videos on YouTube. In particular, I find Michael Sealey's Sleep Hypnosis Floating Relaxation quite powerful. Many of his videos have been helpful for me to help dissolve fear at it's root in the sub-conscious mind. There's a few on letting go of over-thinking as well.
While you wait to see a therapist, CCI have excellent resources for self-help for anxiety and a number of other conditions. Here's a link to their website:
www.cci.health.wa.gov.au/Resources/Looking-After-Yourself/Anxiety
I use Bach flower remedies and practice grounding techniques every morning. The one I find most useful is imagining myself strongly rooted to the ground and visualizing an oak tree before me. Winds and storms may come and go but I stay firmly rooted to the Earth. I find that having small rituals that I practice regularly helps me to strengthen my conviction that I am safe and protected. If I am safe and protected, so is my child.
I am also seeing a kinesiologist. She tests my body for what it needs in terms of diet and supplements and shows me techniques and practices that help me strengthen my body and mind. I highly recommend kinesiology for people who suffer with ungrounded anxiety. Often it can be the result of a deficiency in your diet, other times it is an emotional issue. Either way, a kinesiologist can help you identify the underlying issue and very often can help you solve it.
I hope this is helpful. Take care.