I’m struggling with well everything right now?? And I do t feel like my husband is being very supportive... [I Pregnant]

So I’m 18 weeks pregnant and also taking care of my 1.5 yr old son. My husband works 24-36 hr shifts so it’s often just me and my toddler at home which we did perfectly fine before I got pregnant but now I’m just exhausted all the time and often don’t feel very well. I was always really good about keeping the house clean,cooking, doing well everything except working a paying job. And now I just havnt been able to keep things up like I’m used to doing which is already hard for me because I don’t like asking for help or feeling like I can’t do things myself. But my husband is constantly complaining since I’ve been unable to do everything like I used to, telling me I have to do better and step up to the plate and when he’s at work I should be working at home and he shouldn’t have to come home to dirty dishes or laundry. The main reason I do less around the house while he’s not here is because I’ve felt very dizzy the last few weeks and I fear I’ll do to much and pass out and our son will get hurt while I’m out of it cuz he doesn’t understand the concept of 911 yet. I have no close family or friends that would check up on us so literally no one would know anything is wrong until my husband gets home. I never ask him to do anything and I’m constantly cleaning up after him (probably more than I have to our child) cuz I know he works and pays the bills So I guess my question is am I really just being a baby and need to continue doing absolutely everything and tough through or is my husband being a inconsiderate jerk and if so how can I make him understand what I’m going through because we’ve had multiple conversations and he just says don’t give up on me. but hell I already do everything but make the money I can get a job and not be yelled at by a man and raise 2 kids I wouldn’t be the only woman in the world I’ve always been very independent anyways. But I really want our marriage to work it’s just so hard right now when he seems to not even try to understand what I’m going through.