I'd just add to what Karyn said that for health reasons, it's important you let any healthcare providers know that you've had intercourse if they're asking about anything to do with sexual/reproductive health, and also to start with your routine sexual healthcare - including STI testing - if you haven't already. Bacteria and viruses don't care - and nor can they, as they're not sentient! - about the circumstances or how we feel about a sexual act, they only respond to the biology. So, you'll want to make sure that you're taking care of your own health and the health of any future partner. Did you and this partner use a condom?
About any future partner: we're not required to tell a partner details about our sexual history if we don't want to. However, it's important to give a potential sexual partner any relevant information for them to make decisions and take care of their own sexual health: for example, if we've had sexual contact or never had STI testing, it'd be wrong to tell a potential partner that we'd never had sexual contact or that we'd had testing. Too, usually it's much, much better to choose partners where we feel safe and able to be honest about ourselves and our histories; if we feel like we can't be, that's usually a big signal that something's wrong or that they're not a good fit as a partner for us. So, if you're a virgin according to what that means to you, you may well want to explain what that means to a future partner.
Just so you know, too: it's
always okay to decide that you don't want to have sex, for any period of time, no matter what you've done in the past. Sex or not-sex isn't a one-way switch that you can never turn back to "no, thanks" or "no, thanks, for now"; you can turn the switch to wherever you want, as many times as you want, whenever you want.
You said you were raised in a christian family: sometimes, some christian outlooks can be a bit "you-can-never-go-back" about having sex. That's not true. I mean, you can't un-have sex that's already done, but having sex once or many times doesn't change who you are if you don't want it to, and doesn't change your worth as a person. You have the right to decide whether sex is or isn't right for you, with any particular person, at any particular time. We're big cheer-leaders for people
always nixing sex that they don't feel ready for, that they don't really-really-very want, no matter how many previous partners they've had or however many times they've had sex. Of course you have the right to wait to have sex until whenever and whoever it feels truly right for you and you really-really want it
This piece on the main site might really help you out:
Don't Want To Have Sex?
A LOT of sexual response - most of it - happens in the brain. You said you weren't really ready to have sex with this guy. If you weren't really into it, if you weren't feeling hell-yes-I-want-to-do-this, that'd explain a lot of why you didn't feel much. If the brain's in a "meh" place rather than a "yay sex!" place, we're probably going to physically feel a whole lot of "meh", and maybe even not feel very much at all.
As you said you didn't feel ready, can I check with you whether this was consensual? Did you feel like you were making the choice to have sex, and that you could also have made the choice not to?