Is it normal to feel like this?

The fact you felt the urge to post this question implies that you identify as straight. First of all, you should understand that the changes in your body that you noticed while watching the porn does NOT necessarily mean that you're a lesbian or bisexual. It is possible that you have been in denial that you're sexually attracted to other women, but something very different may have been going on.

What you felt are the physiological responses to female sexual arousal - increased heart rate, blood pressure and breathing, and more blood flow to the genitals and breasts which results in the nipples getting hard, the clitoris erecting, the vulva becoming more sensitive and the vagina lubricating. The female sexual response is complicated, and many women can be very confused when notice that their body has become physically sexually aroused when their conscious brain is thinking that what they're seeing or experiencing is not very sexy, disgusting or even terrifying.

There was a classic experiment performed a few years ago by sexuality researchers where women were attached to sensors which could measure those physiological responses and they were shown various videos which they were asked to rate on a scale of how sexy they found them. What the researchers discovered is that although women who identified as straight said they didn't find lesbian porn arousing (and vice versa), the instruments showed that most of them still had a physical response (faster breathing, increased heart rate, blood pressure up and increased vaginal lubrication). The most extreme example of this contrast between what women thought and their body's response was to a video of bonobo chimpanzees having sex. None of the women said that they found the clip sexy, but their bodies definitely reacted.

Physical sexual arousal in both men and women is controlled by our "lizard brain" - a part of our brain which we have no conscious control over. The conclusions the researchers reached is that physical sexual arousal in women is triggered when that part of their brain recognises that the woman is in a situation that is sex-related and _could_ lead to sexual intercourse happening. Meanwhile, completely different things could be going on in the part of their brains that deals with conscious thinking (all the stuff to do with who we believe ourselves to be, rational assessment of the situation we're in and the people we're with, what we believe to be the correct actions in any given situation and so on).

If you'd like to get a better handle on your own sexuality and why you feel the things you do, you might consider reading "Come As You Are" by Dr Emily Nagoski. In the book, she discusses a lot of research into the reality of female sexuality, and how many of the findings contradict what's commonly believed.

Finally, it might make you feel better to know that an awful lot of women who identify as straight enjoy watching lesbian porn. Some of them have lesbian sexual fantasies which they have no intention of trying to make real, but many of the women simply like how the focus of the porn is on female sexual pleasure rather than some dude pounding away in various orifices until he spurts semen on the woman's tits or wherever.

It's normal. I remember watching dogs have sex and felt slightly aroused. I was so ashamed of myself.
But it's normal reaction.

Nothing wrong filling like you did when watching porn,sex excited you and it felt good!!! Just saying

I love lesbians. Its so hot watching two feminine girls go at it. If my wife was bi id try to talk her in to having a girlfriend or something just so I could watch. Or even have her gf live with us. If a girl is bi that automatically gives her sexy points. I wish all girls were bi.