ok venting and crying am I overreacting?!

My mother passed two months before we found out we were 9 weeks pregnant... it's been a hard pregnancy... we had no real warning... it went from her being in the hospital and the drs saying they were releasing her in the morning to her passing in the middle of the night while I watched helplessly... my husband is in the military so we had just pcsed (moved) and my sister has said that she thinks that my mom died bc she missed us so bad and has told my husband that she blames him (her husband is military as well but they have never had to move due to him working at the biggest naval hospital in the country)ANYWAYS my sister has only came to see us once since she we moved and we've went back home at once a month (6hour drive at least with three kids and my husband and I were both working)... the one time she came was to drop off her 3 kids bc she "needed a break" mind you she lives in our hometown and my dad now lives with her...after I had had a stroke 3 weeks before...and my husband was suffering from a TBI (traumatic brain injury).... so fast forward to this month she bought a dog named it what we were going to name our daughter...told my dad he couldn't come visit us bc she decided three days before he was supposed to come that she was going to do her daughters birthday a month late... annnnnnd called everyday to cry and say she doesn't understand why we couldn't come....ummm I'm due in 11 days and I have had blood clots since my stroke.... but what GETS ME THE MOST!!!! Is everytime I talk to her she tells me, "mom wouldn't like that"...."mom told me not to do that".... "you know mom wouldn't want you to let your kids watch that" everything I do as a mom my sister says my mom wouldn't like ...CONSTANTLY!!! I can't do it! I miss my mom enough...I only get to see my dad once every few months unless we drive down... I'm just so done...she "says" she's coming when I give birth but I'm to the point where I don't know if I want her there....sorry for the long post if your still reading thank you I really needed to vent...
Update: thank you everyone for your kind words... I really do... I know it's stupid for it to get so under my skin but it does when it's every conversation... and I get exhausted after every hang up and then I'm moody... but I really do appreciate your kind words ❤️❤️❤️