Feeling Lost...Tired of the Anxiety Taking Over

I've had anxiety my whole life, but lately it has just gotten out of hand. I'm 27 years old with four kids, the youngest being only 5 months. I also have a 17 month old, so having two little ones so close together is exhausting. I am a stay at home mom, and don't get out much except for on Fridays when I go to town to pay bills, get groceries and such. I have a handful of friends, but most of my good friends moved away, and the friends I have still here I don't have a lot in common with anymore. My family all lives close, but they really aren't any help to me. My mom lives right up the street ,but barely ever comes to see me or her grandkids. But anyhow, lately my health anxiety has been through the roof. I'm not sure what started it, although my husband had to go out of town about a month ago to work for two weeks, and it left me with our four kids by myself. I was extremely stressed, and started having bad stomach trouble, and also got diagnosed with IBS at that time. I got that situation under control, but then I noticed that my blood pressure was always sitting high. I am already on blood pressure medication, and usually my blood pressure never goes over 120/80. I went and bought a blood pressure machine at home, and I checked it quite a few times while under stress and the numbers were pretty shocking. So that has become a constant source of worry lately. I have been to my dr about it, and he told me to just try to check it at the same time everyday, especially in the morning. I've been doing that and my blood pressure has been pretty good, but I was feeling anxious last night and decided to check it and it was 150/90. So i started panicking and checking it over and over until it eventually went back to normal once the panic subsided. I drive my husband crazy with all my worrying, and I am just at the point I can't handle it anymore. I can't afford therapy as I am about to lose my insurance. I figured that would be my best bet too. :( I thought maybe it would help to get on here and just talk to people who understand. Thanks for listening. :)