Page loading

Hello I am having an issue with really slow uploading on my homepage. It only happens on my computer…not my phone, iPad or husband’s computer. I have a Specific Feeds subscription form that keeps flashing on and off. I have a screen shot. Not sure if this is a plug in issue or a computer issue (slow computer). It just started happening. It only happens when I am in the WordPress on my site. I won’t include a link because you won’t see it.