I orgasm first, but now I'm bleeding

It is certainly possible that sometime during sex⁠ (sex: Different things people choose to do to actively express or enact sexuality and sexual feelings; often this involves genitals, but not always. ) you are getting some little abrasions that are causing you to spot afterward. Since you are not bleeding heavily, the abrasions are probably not serious, but just enough to cause some irritation. If you are not having this issue during other activities, then the most likely culprit is a lack of lubrication. Because of the way our anatomy⁠ (anatomy: The body, parts of the body, or physical structure of organisms like people, animals or plants.) works, women pretty much produce lubrication during one part of arousal⁠ (arousal: A state of sexual excitement and interest that sends messages to the brain which create physical changes and sensations, such as increased blood pressure, erection, lubrication, loosening of the vaginal or anal muscles, and increased physical sensitivity.) and then don’t really produce much more after that (this is not true for everybody, but it is for some). With all of the friction associated with sex, and especially with condoms that lubrication that is naturally produced (and even added artificial lube) can get dried out⁠ (out: Short for ‘out of the closet’. When someone’s LGBTQ+ identity is known to other people.) before we want to be done. An easy fix for this is to add some extra lube at various times during sex.

You don’t mention whether you are having discomfort during sex associated with this or not. It is common to become extra-sensitive after orgasm⁠ (orgasm: An event typically in response to physical or intellectual sexual stimulation, controlled by the involuntary nervous system. ) . If you are having some discomfort or pain when you continue intercourse⁠ (intercourse: When people interlock their genitals and move together as feels good to them for the purpose of sexual stimulation and/or reproduction.) , then the best thing is probably to take a break after you orgasm from that activity for a while. There are plenty of other activities that you can engage in that will be pleasurable for your partner⁠ (partner: In a sexual context, a person with whom someone is having some kind of sex. The term “partner” can be used for all kinds of relationships, not just serious ones. “Partner” can also mean the person someone is with in a romantic or familial partnership.) and avoid any pain for you. You can either do those activities until your partner orgasms or until you are no longer quite so sensitive (AND you wish to engage in intercourse again).

If you haven’t had your annual sexual⁠ (sexual: About or relating in some way to sex or sexuality.) health exam, now would be a good time to do that as well. Some STI⁠ (STI: Sexually transmitted infections: illness, infection and/or disease which is often or can be transmitted through sexual or other intimate contact, like HIV, Chlamydia or Herpes. Some people call STIs STDs.) ’s can cause sex to be uncomfortable. This may not be associated with what you are experiencing, but it’s always better safe than sorry (and you will also have the opportunity to speak with your health care provider about this and maybe get some other suggestions).

You may find the following pages helpful:
From OW! to WOW! Demystifying Painful Intercourse
Sexual Response & Orgasm: A Users Guide
Sexual Health 101: Hers
Testing, Testing…
Condom Basics: A User’s Manual