May is an odd transitory phase for both the weather and your indoor spring heating and cooling. One week it could 80 degrees and the next, snow.
Low water pressure is more than just an inconvenience to you and your family. Depending on the cause, you may need to call your local water department.
There are never convenient time for plumbing issues, but as soon as sump pump problems arise, your basement may not have much time before it floods.