Not eating enough...

Recently on the average day i eat maybe about 1000 calories because i eat cereal for breakfast or i dont eat breakfast at all and then i eat dinner at like 10pm. This is due to being at work ALL day and not taking my time to eat or anything because im running behind on work, i work with my husband and hes usually the one to decides when to stop and eat. When we do eat i choose fast things becuase by that time im starving and i just want food in my system. After we eat my husband always complains about how bad and crappy he feels after eating that food, so i feel guilty that hes gaining weight and feeling bad because of the food i choose to eat( ps he has a thyroid condition so recently hes been slowly gaining weight just in his stomach) so due to eating so late im never eating more than one or two meals a day. So today all ive had is cereal and now im eating a hot pocket due to no food in the house and i feel like such a shit mom already because im not making sure im eating enough.. im afraid im slowly starving my baby even though at 24 weeks he weighed 1lb 8oz. I havent gained any weight at all so far (i weighed 200lbs pre pregnancy and i still weigh 200lbs) and i have no bump and i am crying because im afraid of what i might be doing by not eating enough. Also I'm 26 weeks.