12 weeks 4 days struggling

Is anyone else struggling with weight gain and feeling awful? I used to be heavy 220-245 lbs. I lost weight and got down to 135-145. Gaining weight bothers me a lot. I know I have to eat and this is for the baby which I do but I walk 5-7 miles a day by the end of the day with my steps and just feel flabby and gross and like I’m gaining fat in my chest my lower body everywhere. I’m so frustrated. I feel guilty for worrying about weight gain but I worked so hard to get it off I don’t want to gain a bunch of weight and do this all over again :( I feel gross.