Visiting inlaws, am I being over dramatic? Anxiety

So me and my husband visit his family's house every Sunday... we try go in the week a few times as he has a younger brother (5) but we both work full time and his schedule changes but we honour our weekend visits.

My only problem is, when we get there I'm expected to entertain his father and his younger brother from the moment I get there until I leave while hubby sits there relaxing on his phone or w.e.

I'm seriously ill have all day sickness. I'm tired by 4pm (that's when we will go today) I can't barely keep my eyes open and just want to sleep, also I have no appetite to eat Middle eastern food (I hate it this pregnancy) and his younger brother is so active just wants me to read to him the same thing 20 times.. pick him up and swing him about and give him my undivided attention aswell as his father asking me a million questions about my work finances etc.

It's just tooo much! For the past 1 month I end up going upstairs for a long bathroom break to cry because I just wanna sleep! And my husband says for 4 hours why can't I act normal???

??!!!?????! I've got anxiety going tonight

Am I overacting?? Is it hormones?? I'm greatful I'm so loved by them but it's too much while I feel like this!

Help me see sanity plz!