Remedies on a budget

So March, April, and May always bring financial problems for us, idk why. Anyway, it sucks being preggers right now because we're shopping on a budget. I've been so constipated for the last week. What can I eat to help remedy this issue that won't break the bank. PS I hate prunes! Any suggestions? I've also been dealing with morning sickness. I finally broke down and spent $10 on sea bands, they help take the edge off but don't kill it 100%.