AITAH for getting pissed at my boyfriend for not knowing shit about periods?

AITAH for getting pissed at my boyfriend for not knowing shit about periods?

My boyfriend (M22) and I (F21) have been together for two months now. I’m his first girlfriend and I can tell he’s so elated to finally be in one.

Today I messaged him that my abdomen hurts because of cramps (yes I told him it was period cramps). He didn’t have much to say but reassurances and telling me to drink water and rest. It was clear from the way he responded that he didn’t really know how to handle period conversations.

Now I don’t expect him to know everything about periods, however he has a little sister. He said before that he stayed out of the way and let his mom take care of his sister. I just found it sort of tone-deaf to not at least know something about periods since you have a sister and you’re the eldest? Actually I’m not even mad about him not knowing about periods, it was the way he responded and handled it that ticked me off. He sounds like he doesn’t want to do anything with my periods either, just like with his sister.

I mentioned that I am his first girlfriend, and because of that I cut him some slack for not having any girl relationship experiences. My point is: wanting a girlfriend (the idea) is different from finally having one (the reality). He wanted a girlfriend, and he got one. It’s not all fantasy buddy, you need to do the work too. We’re gonna have good and bad days. I want and need him to at least put in effort in understanding me and my body the same way I’m doing my best to understand him and really putting in the effort to work on this relationship.

I just feel bad sometimes for getting mad at seemingly the “littlest things” (like this situation) (and probably hormones) when my needs aren’t being met because of my previous relationship experiences and my ex telling me that being with me was like “walking on eggshells”, basically calling me sensitive for having needs. But I’m older now and I’m no longer afraid to communicate what I need.

AITAH for being mad about something this small so early into the relationship? Or am I healthily and rightfully pissed about my needs not being met?

Edit: Wow I didn’t expect to get responses quickly. Thank you for both calling me out and understanding me. I guess I was having expectations and wasn’t able to communicate them so when he responded differently I got disappointed. Thanks for the range of responses. I’m gonna talk to him about it.

Edit 2: I realized perhaps the reason I reacted so badly was because, while I agree with the walking on eggshells part and I admit that I tend to overreact disproportionately, my ex cheated on me (I still remember the memory of seeing hickeys all over his neck when I thought we were doing okay together). That’s why I’ve started to fear the littlest things in relationships and overanalyze everything. Nonetheless I take accountability for my reaction and being 21 doesn’t justify it. Still thank you for both the upfront and advising responses I very much appreciate it and will do better. And yes we are fresh into this relationship and I do need to heal from my previous wounds. Thank you fellow internet people.