Really scared about how it could turn out!

Hi, I am booked in for a vaginal/possible vertical abdominal hysterectomy of the uterus and cervix on June 29th.
The main problem for me is the mental side of not being able to ever become pregnant again. I cannot think about it without crying and become panicky.
As I will be having the surgery for chronic pain especially when bleeding and possible Endo at the fortix I have this great fear that I will have the surgery and it wont change anything. I fear my pain will continue and it will end up being some other problem and I didn't even need the hysterectomy in the first place.
My gyno told me that as I have had 3 c-section a 4th pregnancy would be high risk and the actual 4th c-section would be far riskier than ever my 3rd one.
I recall asking his the first time I was referred to him about a 4th pregnancy and he told me that that is the surgeons problem, having to go through all the scar tissue etc, he never said anything about the pregnancy being so high risk that its not a good idea for me to have another baby. I've had two hernias repaired with mesh also and I asked if that would be a problem if I became pregnant again one day and he said no.
My g.p referred me back to this Gyno and said if he thinks its not gynaecological that I should see a gastroenterologist, I'm wondering now if I should cover all bases before I make my final decision about having a hysterectomy.
The problem with this is, I would have to go back to my G.P, get another referral and then it may take months to see a gastroenterologist and if it ends up I do need a hysterectomy I will most likely miss my June 29th surgery date and then have to wait until August maybe longer.
I guess I feel very vunrable at the moment as I just want this pain to be over but the thought of having the hysterectomy and ending up I never even needed it is driving me crazy.
Thank you.

I am sorry that you are going through this and feeling so torn. The good thing is that you have time. Even if it is after your 6/29 surgery date, I think it is better to wait and know that you've made the right decision instead of feeling rushed and having regrets. I have 3 children as well. I had endo and a very difficult time getting pregnant with my third. There is a 7 year difference between my middle and youngest child. I had to see an infertility specialist and they thought that I had a blocked tube. I had to decide if I wanted the tube removed or opened up. I went back and forth for a long time. The only thing that I knew for certain is that I wanted another child. I was starting to look into adoption as well. I canceled my surgery because I was afraid. One day I had enough and I knew that I needed to decide. I prayed so hard that God would give me direction. I soon had a peace about having the surgery. So back I went to the surgeon and was scheduled again. During the surgery the dr. saw that it wasn't a blocked tube at all but severe endo. He cut it away and said if I was going to get pregnant I would within 6 months. In four months I became pregnant with our daughter. She was born via c-section, my middle baby was premature and my first born had some complications as well. (they are all healthy kids). When I found out that my endo was back, I was OK with a hyst. I was afraid, but didn't question that it was the right thing to do. If I were to become pregnant again, I also knew that it would be a risk given my history. However I am at peace and know that my family is complete. You need to explore all of your options and get another opinion, even if it takes longer. You cannot reverse a hysterectomy. I hope this helps.