Disappointed

I’m 26 weeks pregnant and I need to just vent ....since I found out I was pregnant I have been working at a call center all was well until sitting down was really getting to me it was hurting my back I had to wake up at 5am every morning doing the same thing over and over again everyday was slowly killing me today ....as I was outside of work I couldn’t take it anymore .....and I texted my husband That I was going anymore that it I had it ....I feel very disappointed in myself .... I feel sad I know this is what I wanted but I use to be such a hard worker before I got pregnant and I thought I was going to be able to work my whole pregnant and now I’m just really disappointed in myself I feel like I have failed and I didn’t try harder but just the thought of going into work was killing me ...my husband is supportive but I guess no matter what he says I’m still very hard on myself I have never been one to just not work I’m always working so I’m scared I’m a couple of weeks ima go crazy ....of doing nothing