Pregnancy tests take about 2-5 minutes to do. If you go to a clinic and they won’t give you your results for 30-45 minutes, it may be so they can persuade you to watch anti-abortion videos or see other anti-abortion propaganda. Some of them will push Christian propaganda on you. If you feel a need for any kind of Christian pastoral counseling, you can get it separately from medical services. A priest or pastor at a church should be willing to help you with that. There’s no need to get that at the clinic.
There is no link between abortion and breast cancer. Carrying a pregnancy to term is more dangerous than having a legal abortion. A legal abortion is not likely to cause future infertility. There is no link between having an abortion and future mental health problems. Nobody knows whether or not having an abortion will damage your relationship with God. Any clinic that tells you something different from any of these may have their own agenda.
If a clinic won’t tell you, when you call them, whether or not they provide abortions or referrals for abortions, they probably don’t do those things. Find a different clinic.
If you are pregnant, after you decide what to do about it, you will have no way of knowing how happy you would or wouldn’t be if you had made a different decision. This is true of lots of major life choices. I might think I would have been happier if I had gone to a different grad school, but I have no way of knowing that. Maybe I would have been, maybe I wouldn’t. You can’t know how things would have turned out if you had made a different decision, and neither can anybody else. If you have an abortion, you won’t know how happy you might have been if you had had the baby. But the same is true if you have a baby- you won’t know how happy you might have been if you hadn’t had the baby.
There is no choice you can make, about pretty much anything, that comes with a guarantee that you won’t regret it later on. Life just does not work that way.
If you’re in the US, you should be able to get a home pregnancy test at any pharmacy (the CVS near me has them near the condoms), and in some grocery stores. Dollar Tree has them for $1. You shouldn’t need to go to a clinic to take a pregnancy test because it’s difficult to get a home pregnancy test. It isn’t.