First time meditating on Muladhara. Is what happened normal?

Hello everyone.
I won’t describe my whole journey and state of mind, let’s just say that lately I’ve been feeling a bit lost and unsure of where to begin which is why I turned toward spiritual searching and self-exploration.

When I came across Hinduism, I started studying everything related to it and naturally ended up learning about chakras.

Today I decided to listen to a Muladhara chakra mantra and meditate on it, focusing all of my attention on the area around my anus.
I understand that listening to mantras live is different from listening to them through headphones, but still.

While listening to the mantra and concentrating on my anus (it felt like the best point to focus on because it was the easiest), I started feeling certain responses in my body. It’s probably important to mention that I’m heterosexual, but during this meditation I involuntarily began thinking about something almost entering my anus, though I didn’t give it any specific form. I don’t even really know how to describe it. It felt as if something was entering, yet nothing concrete at the same time, and suddenly I felt blood rushing through my entire pelvic area and I got an instant and very strong erection.

At first I even started doubting myself a little and tensed up, but eventually I decided to let go and allow that energy to exist.

But after staying in that state for a short while, I decided to stop because I didn’t want to let that energy go any further for now.
So that was the experience. Does this mean that everything is functioning normally? Does it mean that in the future I should continue focusing on thoughts and feelings in that direction and allow that energy to move further upward?