Bitten by a Seal..fucking hell there isnt many people who can tell that to the grandkids so think of the silver lining.
Seriously though, you are well rid of your ex. Him lying about his income surely means a bigger divorce settlement than you were expecting.
Was the sex with the guy worth it? If it was then forget him and move on. Last thing you need right now anyway is another man to deal with.
Spyware. Take all devices to a phone shop and ask them to check them for hidden spyware or go on reddit and ask for advice how to find hidden spy apps..get an alarm company out to do a maintenance on your smoke alarms and check them for cameras at the same time and check for any hidden cameras anywhere else they could be (most alarm companies are also CCTV installers so will know what to look for) check under your bed, mattress, behind headboard etc for hidden phone set to record.
Your sons bday what age is he? Could you buy things for click and collect and get a friend or family member to pick them up for you?
Your cervix, hope this all goes well and they get it all removed. This would understably worry anyone. Never mind without all the other cluster fuck of stuff.
Campervan, do you not have emails with your address on you could print for things like driving insurance, gas or electric?
I'm sorry you are going through so much at once. Life really is sent to test us sometimes but I always tell myself (I often have alot of shit going down at once) I will come out the other side of this stronger and wiser and less accepting of bullshit from men....and seals in your case.