Several of us on SD self included have Lymes disease. It's far worse than many tropical diseases including Malaria and Bilharzia which I have both also had.
If you have been bitten by ticks and feel at all unwell seek medical help ASAP. Lymes is quite difficult to diagnose as it's a slow developing bacteria, there is an antibody test, but this is only effective about 40% of the time - ie picks up about 4 out of 10 cases. It also requires disease to be well established for it to work at all.
Thus:
1) try and avoid long grass or crawling through the heather - sit on a rock rather than on the grass to have your lunch.
2) use a good tick repellent
3) wash all over with a good insecticidal shampoo - kids not treatment - to get rid of ticks and tick larvae from all the knooks and crannies
4) if you ache, feel sick, tired, fluey etc suspect Lymes and get the Dr to look into it. If they haven't a clue get them to refer you to infectious diseases.
5) consequences of delaying treatment are pretty horrendous and potentially life threatening.