How do you ask your man to support you on your period?

Having a longer than usual period and my s/o is about to go out of town for 3 days. Were bickering a lot and I have had the worst cramps I've had in years for days in a row, which has left me grumpy, lazy, and unwilling to move much. He's totally shitting on me about it and I'm frustrating him because I have foggy period brain & keep dropping the ball when he asks me to do something. I feel really bad, but them apologize and do it all over again!! I don't blame him for being frustrated as I've been SO forgetful and off this past week, but even after I apologize I do it again because I am just NOT Myself right now.

Any advice much appreciated. Trying to stay patient but wanting to give up & go to bed when we fight, he goes on and on and I'm fkn exhausted but don't want to sabotage our relationship right before his trip. We usually do fine. Ugh